64643236 has 24 divisors (see below), whose sum is σ = 132039936. Its totient is φ = 27114240.

The previous prime is 64643221. The next prime is 64643261. The reversal of 64643236 is 63234646.

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, 23245 + ... + 25876.

It is an arithmetic number, because the mean of its divisors is an integer number (5501664).

Almost surely, 2^64643236 is an apocalyptic number.

It is an amenable number.

64643236 is an abundant number, since it is smaller than the sum of its proper divisors (67396700).

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

64643236 is a wasteful number, since it uses less digits than its factorization.

64643236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49179 (or 49177 counting only the distinct ones).

The product of its digits is 62208, while the sum is 34.

The square root of 64643236 is about 8040.1017406498. The cubic root of 64643236 is about 401.3356103985.

The spelling of 64643236 in words is "sixty-four million, six hundred forty-three thousand, two hundred thirty-six".