64288140 has 48 divisors (see below), whose sum is σ = 205723392. Its totient is φ = 14694336.

The previous prime is 64288093. The next prime is 64288163. The reversal of 64288140 is 4188246.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76114 + ... + 76953.

It is an arithmetic number, because the mean of its divisors is an integer number (4285904).

Almost surely, 2^64288140 is an apocalyptic number.

64288140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64288140 is an abundant number, since it is smaller than the sum of its proper divisors (141435252).

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

64288140 is a wasteful number, since it uses less digits than its factorization.

64288140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153086 (or 153084 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 64288140 is about 8017.9885258087. The cubic root of 64288140 is about 400.5993930380.

The spelling of 64288140 in words is "sixty-four million, two hundred eighty-eight thousand, one hundred forty".