3974214640 has 80 divisors (see below), whose sum is σ = 10099041120. Its totient is φ = 1442447360.

The previous prime is 3974214631. The next prime is 3974214641. The reversal of 3974214640 is 464124793.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 3974214593 and 3974214602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3974214641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 496752 + ... + 504688.

It is an arithmetic number, because the mean of its divisors is an integer number (126238014).

Almost surely, 2^3974214640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3974214640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5049520560).

3974214640 is an abundant number, since it is smaller than the sum of its proper divisors (6124826480).

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

3974214640 is a wasteful number, since it uses less digits than its factorization.

3974214640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530 (or 8524 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 3974214640 is about 63041.3724469891. The cubic root of 3974214640 is about 1583.9827205373.

The spelling of 3974214640 in words is "three billion, nine hundred seventy-four million, two hundred fourteen thousand, six hundred forty".