64021236 has 24 divisors (see below), whose sum is σ = 155878464. Its totient is φ = 20412480.

The previous prime is 64021229. The next prime is 64021267. The reversal of 64021236 is 63212046.

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, 115705 + ... + 116256.

It is an arithmetic number, because the mean of its divisors is an integer number (6494936).

Almost surely, 2^64021236 is an apocalyptic number.

It is an amenable number.

64021236 is an abundant number, since it is smaller than the sum of its proper divisors (91857228).

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

64021236 is a wasteful number, since it uses less digits than its factorization.

64021236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231991 (or 231989 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 64021236 is about 8001.3271399187. The cubic root of 64021236 is about 400.0442367743.

The spelling of 64021236 in words is "sixty-four million, twenty-one thousand, two hundred thirty-six".