111399990 has 32 divisors (see below), whose sum is σ = 287927136. Its totient is φ = 27421440.

The previous prime is 111399989. The next prime is 111400013. The reversal of 111399990 is 99993111.

It is a Curzon number.

It is a congruent number.

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, 142431 + ... + 143210.

It is an arithmetic number, because the mean of its divisors is an integer number (8997723).

Almost surely, 2^111399990 is an apocalyptic number.

111399990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111399990 is an abundant number, since it is smaller than the sum of its proper divisors (176527146).

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

111399990 is a wasteful number, since it uses less digits than its factorization.

111399990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285664.

The product of its (nonzero) digits is 19683, while the sum is 42.

The square root of 111399990 is about 10554.6193678408. The cubic root of 111399990 is about 481.1661316716.

The spelling of 111399990 in words is "one hundred eleven million, three hundred ninety-nine thousand, nine hundred ninety".