111993660 has 36 divisors (see below), whose sum is σ = 339714648. Its totient is φ = 29864928.

The previous prime is 111993653. The next prime is 111993667. The reversal of 111993660 is 66399111.

It is an interprime number because it is at equal distance from previous prime (111993653) and next prime (111993667).

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111993667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310914 + ... + 311273.

It is an arithmetic number, because the mean of its divisors is an integer number (9436518).

Almost surely, 2^111993660 is an apocalyptic number.

111993660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111993660 is an abundant number, since it is smaller than the sum of its proper divisors (227720988).

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

111993660 is a wasteful number, since it uses less digits than its factorization.

111993660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622202 (or 622197 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 111993660 is about 10582.7057031744. The cubic root of 111993660 is about 482.0193572456.

The spelling of 111993660 in words is "one hundred eleven million, nine hundred ninety-three thousand, six hundred sixty".