100381440 has 72 divisors (see below), whose sum is σ = 320605488. Its totient is φ = 26767360.

The previous prime is 100381399. The next prime is 100381459. The reversal of 100381440 is 44183001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9231 + ... + 16910.

It is an arithmetic number, because the mean of its divisors is an integer number (4452854).

Almost surely, 2^100381440 is an apocalyptic number.

100381440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100381440 is an abundant number, since it is smaller than the sum of its proper divisors (220224048).

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

100381440 is an equidigital number, since it uses as much as digits as its factorization.

100381440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26165 (or 26151 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 100381440 is about 10019.0538475447. The cubic root of 100381440 is about 464.7482971236.

The spelling of 100381440 in words is "one hundred million, three hundred eighty-one thousand, four hundred forty".