64620404 has 12 divisors (see below), whose sum is σ = 113215200. Its totient is φ = 32273208.

The previous prime is 64620401. The next prime is 64620407. The reversal of 64620404 is 40402646.

It is an interprime number because it is at equal distance from previous prime (64620401) and next prime (64620407).

It is a super-2 number, since 2×64620404² = 8351593226246432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64620401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5114 + ... + 12465.

It is an arithmetic number, because the mean of its divisors is an integer number (9434600).

Almost surely, 2^64620404 is an apocalyptic number.

It is an amenable number.

64620404 is a deficient number, since it is larger than the sum of its proper divisors (48594796).

64620404 is a wasteful number, since it uses less digits than its factorization.

64620404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18502 (or 18500 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 64620404 is about 8038.6817327221. The cubic root of 64620404 is about 401.2883542366.

The spelling of 64620404 in words is "sixty-four million, six hundred twenty thousand, four hundred four".