3941738640 has 400 divisors, whose sum is σ = 15891756672. Its totient is φ = 886837248.

The previous prime is 3941738623. The next prime is 3941738681. The reversal of 3941738640 is 468371493.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3038472 + ... + 3039768.

Almost surely, 2^3941738640 is an apocalyptic number.

3941738640 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 3941738640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7945878336).

3941738640 is an abundant number, since it is smaller than the sum of its proper divisors (11950018032).

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

3941738640 is a wasteful number, since it uses less digits than its factorization.

3941738640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396 (or 1381 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 3941738640 is about 62783.2671975583. The cubic root of 3941738640 is about 1579.6563157824.

The spelling of 3941738640 in words is "three billion, nine hundred forty-one million, seven hundred thirty-eight thousand, six hundred forty".