64620356 has 12 divisors (see below), whose sum is σ = 115219692. Its totient is φ = 31700448.

The previous prime is 64620343. The next prime is 64620379. The reversal of 64620356 is 65302646.

It can be written as a sum of positive squares in 2 ways, for example, as 30980356 + 33640000 = 5566^2 + 5800^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152195 + ... + 152618.

It is an arithmetic number, because the mean of its divisors is an integer number (9601641).

Almost surely, 2^64620356 is an apocalyptic number.

It is an amenable number.

64620356 is a deficient number, since it is larger than the sum of its proper divisors (50599336).

64620356 is a wasteful number, since it uses less digits than its factorization.

64620356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304870 (or 304868 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 64620356 is about 8038.6787471574. The cubic root of 64620356 is about 401.2882548776.

The spelling of 64620356 in words is "sixty-four million, six hundred twenty thousand, three hundred fifty-six".