111660390 has 32 divisors (see below), whose sum is σ = 297761760. Its totient is φ = 29776032.

The previous prime is 111660389. The next prime is 111660427. The reversal of 111660390 is 93066111.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 206509 + ... + 207048.

It is an arithmetic number, because the mean of its divisors is an integer number (9305055).

Almost surely, 2^111660390 is an apocalyptic number.

111660390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111660390 is an abundant number, since it is smaller than the sum of its proper divisors (186101370).

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

111660390 is a wasteful number, since it uses less digits than its factorization.

111660390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413573 (or 413567 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 111660390 is about 10566.9479983579. The cubic root of 111660390 is about 481.5407521724.

The spelling of 111660390 in words is "one hundred eleven million, six hundred sixty thousand, three hundred ninety".