108921440 has 24 divisors (see below), whose sum is σ = 257327280. Its totient is φ = 43568512.

The previous prime is 108921437. The next prime is 108921467. The reversal of 108921440 is 44129801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340220 + ... + 340539.

It is an arithmetic number, because the mean of its divisors is an integer number (10721970).

Almost surely, 2^108921440 is an apocalyptic number.

108921440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

108921440 is an abundant number, since it is smaller than the sum of its proper divisors (148405840).

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

108921440 is an equidigital number, since it uses as much as digits as its factorization.

108921440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680774 (or 680766 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 108921440 is about 10436.5434891060. The cubic root of 108921440 is about 477.5708291083.

The spelling of 108921440 in words is "one hundred eight million, nine hundred twenty-one thousand, four hundred forty".