108781520 has 20 divisors (see below), whose sum is σ = 252917220. Its totient is φ = 43512576.

The previous prime is 108781507. The next prime is 108781531. The reversal of 108781520 is 25187801.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52591504 + 56190016 = 7252^2 + 7496^2 .

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

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, 679805 + ... + 679964.

It is an arithmetic number, because the mean of its divisors is an integer number (12645861).

Almost surely, 2^108781520 is an apocalyptic number.

108781520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

108781520 is an abundant number, since it is smaller than the sum of its proper divisors (144135700).

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

108781520 is a wasteful number, since it uses less digits than its factorization.

108781520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359782 (or 1359776 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 108781520 is about 10429.8379661431. The cubic root of 108781520 is about 477.3662463564.

The spelling of 108781520 in words is "one hundred eight million, seven hundred eighty-one thousand, five hundred twenty".