108779990 has 16 divisors (see below), whose sum is σ = 213604560. Its totient is φ = 39556320.

The previous prime is 108779987. The next prime is 108780013. The reversal of 108779990 is 99977801.

It is a congruent number.

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, 494345 + ... + 494564.

It is an arithmetic number, because the mean of its divisors is an integer number (13350285).

Almost surely, 2^108779990 is an apocalyptic number.

108779990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

108779990 is a deficient number, since it is larger than the sum of its proper divisors (104824570).

108779990 is a wasteful number, since it uses less digits than its factorization.

108779990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988927.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 108779990 is about 10429.7646186287. The cubic root of 108779990 is about 477.3640083115.

The spelling of 108779990 in words is "one hundred eight million, seven hundred seventy-nine thousand, nine hundred ninety".