100078280 has 16 divisors (see below), whose sum is σ = 225176220. Its totient is φ = 40031296.

The previous prime is 100078273. The next prime is 100078291. The reversal of 100078280 is 82870001.

It can be written as a sum of positive squares in 2 ways, for example, as 95609284 + 4468996 = 9778^2 + 2114^2 .

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, 1250939 + ... + 1251018.

Almost surely, 2^100078280 is an apocalyptic number.

100078280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100078280 is an abundant number, since it is smaller than the sum of its proper divisors (125097940).

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

100078280 is a wasteful number, since it uses less digits than its factorization.

100078280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501968 (or 2501964 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 100078280 is about 10003.9132343299. The cubic root of 100078280 is about 464.2799662968.

The spelling of 100078280 in words is "one hundred million, seventy-eight thousand, two hundred eighty".