100663280 has 20 divisors (see below), whose sum is σ = 234042312. Its totient is φ = 40265280.

The previous prime is 100663261. The next prime is 100663291. The reversal of 100663280 is 82366001.

It is a tau number, because it is divible by the number of its divisors (20).

It is a zygodrome in base 4.

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, 629066 + ... + 629225.

Almost surely, 2^100663280 is an apocalyptic number.

100663280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100663280 is an abundant number, since it is smaller than the sum of its proper divisors (133379032).

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

100663280 is a wasteful number, since it uses less digits than its factorization.

100663280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258304 (or 1258298 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 100663280 is about 10033.1091890799. The cubic root of 100663280 is about 465.1828471188.

The spelling of 100663280 in words is "one hundred million, six hundred sixty-three thousand, two hundred eighty".