64974072 has 64 divisors (see below), whose sum is σ = 175651200. Its totient is φ = 19958400.

The previous prime is 64974071. The next prime is 64974073. The reversal of 64974072 is 27047946.

It is an interprime number because it is at equal distance from previous prime (64974071) and next prime (64974073).

It is a super-2 number, since 2×64974072² = 8443260064522368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64974072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64974071) 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, 14947 + ... + 18797.

It is an arithmetic number, because the mean of its divisors is an integer number (2744550).

Almost surely, 2^64974072 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 64974072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87825600).

64974072 is an abundant number, since it is smaller than the sum of its proper divisors (110677128).

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

64974072 is a wasteful number, since it uses less digits than its factorization.

64974072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3916 (or 3912 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 64974072 is about 8060.6496016140. The cubic root of 64974072 is about 402.0191075297.

The spelling of 64974072 in words is "sixty-four million, nine hundred seventy-four thousand, seventy-two".