864695280 has 40 divisors (see below), whose sum is σ = 2680556112. Its totient is φ = 230585344.

The previous prime is 864695219. The next prime is 864695303. The reversal of 864695280 is 82596468.

It is a happy number.

864695280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 1801209 + ... + 1801688.

Almost surely, 2^864695280 is an apocalyptic number.

864695280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

864695280 is an abundant number, since it is smaller than the sum of its proper divisors (1815860832).

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

864695280 is a wasteful number, since it uses less digits than its factorization.

864695280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3602913 (or 3602907 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The square root of 864695280 is about 29405.7014879768. The cubic root of 864695280 is about 952.6960460609.

The spelling of 864695280 in words is "eight hundred sixty-four million, six hundred ninety-five thousand, two hundred eighty".