3947044140 has 144 divisors (see below), whose sum is σ = 13371435168. Its totient is φ = 971564544.

The previous prime is 3947044133. The next prime is 3947044147. The reversal of 3947044140 is 414407493.

3947044140 is a `hidden beast` number, since 3 + 9 + 470 + 44 + 140 = 666.

3947044140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3947044133) and next prime (3947044147).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3947044095 and 3947044104.

It is not an unprimeable number, because it can be changed into a prime (3947044147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31944 + ... + 94416.

Almost surely, 2^3947044140 is an apocalyptic number.

3947044140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3947044140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6685717584).

3947044140 is an abundant number, since it is smaller than the sum of its proper divisors (9424391028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3947044140 is a wasteful number, since it uses less digits than its factorization.

3947044140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62510 (or 62496 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 3947044140 is about 62825.5054894109. The cubic root of 3947044140 is about 1580.3647264609.

The spelling of 3947044140 in words is "three billion, nine hundred forty-seven million, forty-four thousand, one hundred forty".