64989236 has 24 divisors (see below), whose sum is σ = 124795944. Its totient is φ = 29427840.

The previous prime is 64989193. The next prime is 64989247. The reversal of 64989236 is 63298946.

It can be written as a sum of positive squares in 4 ways, for example, as 2421136 + 62568100 = 1556^2 + 7910^2 .

It is a congruent number.

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, 9035 + ... + 14546.

It is an arithmetic number, because the mean of its divisors is an integer number (5199831).

Almost surely, 2^64989236 is an apocalyptic number.

It is an amenable number.

64989236 is a deficient number, since it is larger than the sum of its proper divisors (59806708).

64989236 is a wasteful number, since it uses less digits than its factorization.

64989236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23651 (or 23649 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The square root of 64989236 is about 8061.5901657179. The cubic root of 64989236 is about 402.0503802275.

The spelling of 64989236 in words is "sixty-four million, nine hundred eighty-nine thousand, two hundred thirty-six".