64904280 has 64 divisors (see below), whose sum is σ = 222531840. Its totient is φ = 14835072.

The previous prime is 64904263. The next prime is 64904293. The reversal of 64904280 is 8240946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37794 + ... + 39473.

It is an arithmetic number, because the mean of its divisors is an integer number (3477060).

Almost surely, 2^64904280 is an apocalyptic number.

64904280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64904280 is an abundant number, since it is smaller than the sum of its proper divisors (157627560).

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

64904280 is a wasteful number, since it uses less digits than its factorization.

64904280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77288 (or 77284 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 64904280 is about 8056.3192588179. The cubic root of 64904280 is about 401.8751128111.

The spelling of 64904280 in words is "sixty-four million, nine hundred four thousand, two hundred eighty".