64649320 has 32 divisors (see below), whose sum is σ = 151787520. Its totient is φ = 24735040.

The previous prime is 64649287. The next prime is 64649359. The reversal of 64649320 is 2394646.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34216 + ... + 36055.

It is an arithmetic number, because the mean of its divisors is an integer number (4743360).

Almost surely, 2^64649320 is an apocalyptic number.

It is an amenable number.

64649320 is an abundant number, since it is smaller than the sum of its proper divisors (87138200).

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

64649320 is a wasteful number, since it uses less digits than its factorization.

64649320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70305 (or 70301 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 64649320 is about 8040.4800851690. The cubic root of 64649320 is about 401.3482007813.

The spelling of 64649320 in words is "sixty-four million, six hundred forty-nine thousand, three hundred twenty".