863673280 has 28 divisors (see below), whose sum is σ = 2056622760. Its totient is φ = 345469184.

The previous prime is 863673259. The next prime is 863673301. The reversal of 863673280 is 82376368.

It is an interprime number because it is at equal distance from previous prime (863673259) and next prime (863673301).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349170 + ... + 1349809.

Almost surely, 2^863673280 is an apocalyptic number.

863673280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

863673280 is an abundant number, since it is smaller than the sum of its proper divisors (1192949480).

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

863673280 is a wasteful number, since it uses less digits than its factorization.

863673280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2698996 (or 2698986 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 863673280 is about 29388.3187678370. The cubic root of 863673280 is about 952.3205614913.

The spelling of 863673280 in words is "eight hundred sixty-three million, six hundred seventy-three thousand, two hundred eighty".