64804638 has 16 divisors (see below), whose sum is σ = 131066640. Its totient is φ = 21358656.

The previous prime is 64804609. The next prime is 64804643. The reversal of 64804638 is 83640846.

It is a super-2 number, since 2×64804638² = 8399282212622088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64804596 and 64804605.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60145 + ... + 61212.

It is an arithmetic number, because the mean of its divisors is an integer number (8191665).

Almost surely, 2^64804638 is an apocalyptic number.

64804638 is an abundant number, since it is smaller than the sum of its proper divisors (66262002).

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

64804638 is a wasteful number, since it uses less digits than its factorization.

64804638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121451.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 64804638 is about 8050.1327939358. The cubic root of 64804638 is about 401.6693526294.

The spelling of 64804638 in words is "sixty-four million, eight hundred four thousand, six hundred thirty-eight".