64288631 has 10 divisors (see below), whose sum is σ = 70733160. Its totient is φ = 58430900.

The previous prime is 64288613. The next prime is 64288639. The reversal of 64288631 is 13688246.

It is a happy number.

It is not a de Polignac number, because 64288631 - 2¹⁰ = 64287607 is a prime.

It is a super-2 number, since 2×64288631² = 8266056151708322, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64288639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12446 + ... + 16836.

It is an arithmetic number, because the mean of its divisors is an integer number (7073316).

Almost surely, 2^64288631 is an apocalyptic number.

64288631 is a deficient number, since it is larger than the sum of its proper divisors (6444529).

64288631 is an frugal number, since it uses more digits than its factorization.

64288631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4435 (or 4402 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 64288631 is about 8018.0191444022. The cubic root of 64288631 is about 400.6004128933.

The spelling of 64288631 in words is "sixty-four million, two hundred eighty-eight thousand, six hundred thirty-one".