864237956 has 12 divisors (see below), whose sum is σ = 1512868560. Its totient is φ = 431989800.

The previous prime is 864237953. The next prime is 864237973. The reversal of 864237956 is 659732468.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (864237953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16370 + ... + 44681.

It is an arithmetic number, because the mean of its divisors is an integer number (126072380).

Almost surely, 2^864237956 is an apocalyptic number.

It is an amenable number.

864237956 is a deficient number, since it is larger than the sum of its proper divisors (648630604).

864237956 is a wasteful number, since it uses less digits than its factorization.

864237956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64594 (or 64592 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 50.

The square root of 864237956 is about 29397.9243484978. The cubic root of 864237956 is about 952.5280610265.

The spelling of 864237956 in words is "eight hundred sixty-four million, two hundred thirty-seven thousand, nine hundred fifty-six".