100905490 has 32 divisors (see below), whose sum is σ = 208157184. Its totient is φ = 34499520.

The previous prime is 100905487. The next prime is 100905503. The reversal of 100905490 is 94509001.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25975 + ... + 29605.

It is an arithmetic number, because the mean of its divisors is an integer number (6504912).

Almost surely, 2^100905490 is an apocalyptic number.

100905490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100905490 is an abundant number, since it is smaller than the sum of its proper divisors (107251694).

100905490 is a wasteful number, since it uses less digits than its factorization.

100905490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 100905490 is about 10045.1724723869. The cubic root of 100905490 is about 465.5556467130. Note that the first 3 decimals are identical.

The spelling of 100905490 in words is "one hundred million, nine hundred five thousand, four hundred ninety".