863992 has 8 divisors (see below), whose sum is σ = 1620000. Its totient is φ = 431992.

The previous prime is 863983. The next prime is 864007. The reversal of 863992 is 299368.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53992 + ... + 54007.

It is an arithmetic number, because the mean of its divisors is an integer number (202500).

2⁸⁶³⁹⁹² is an apocalyptic number.

It is an amenable number.

863992 is a deficient number, since it is larger than the sum of its proper divisors (756008).

863992 is a wasteful number, since it uses less digits than its factorization.

863992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108005 (or 108001 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 863992 is about 929.5116997650. The cubic root of 863992 is about 95.2437691540.

Subtracting from 863992 its sum of digits (37), we obtain a triangular number (863955 = T₁₃₁₄).

It can be divided in two parts, 8 and 63992, that added together give a cube (64000 = 40³).

The spelling of 863992 in words is "eight hundred sixty-three thousand, nine hundred ninety-two".