860439920 has 40 divisors (see below), whose sum is σ = 2003603904. Its totient is φ = 343645952.

The previous prime is 860439869. The next prime is 860439949. The reversal of 860439920 is 29934068.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 46217 + ... + 62103.

Almost surely, 2^860439920 is an apocalyptic number.

860439920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

860439920 is an abundant number, since it is smaller than the sum of its proper divisors (1143163984).

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

860439920 is a wasteful number, since it uses less digits than its factorization.

860439920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16577 (or 16571 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 860439920 is about 29333.2562120198. The cubic root of 860439920 is about 951.1306648591.

The spelling of 860439920 in words is "eight hundred sixty million, four hundred thirty-nine thousand, nine hundred twenty".