64620072 has 64 divisors (see below), whose sum is σ = 195825600. Its totient is φ = 19581120.

The previous prime is 64620047. The next prime is 64620097. The reversal of 64620072 is 27002646.

It is an interprime number because it is at equal distance from previous prime (64620047) and next prime (64620097).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11223 + ... + 15974.

It is an arithmetic number, because the mean of its divisors is an integer number (3059775).

Almost surely, 2^64620072 is an apocalyptic number.

It is an amenable number.

64620072 is an abundant number, since it is smaller than the sum of its proper divisors (131205528).

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

64620072 is a wasteful number, since it uses less digits than its factorization.

64620072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27223 (or 27213 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 64620072 is about 8038.6610825435. The cubic root of 64620072 is about 401.2876670028.

The spelling of 64620072 in words is "sixty-four million, six hundred twenty thousand, seventy-two".