113621780 has 12 divisors (see below), whose sum is σ = 238605780. Its totient is φ = 45448704.

The previous prime is 113621777. The next prime is 113621803. The reversal of 113621780 is 87126311.

It can be written as a sum of positive squares in 2 ways, for example, as 79352464 + 34269316 = 8908^2 + 5854^2 .

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, 2840525 + ... + 2840564.

It is an arithmetic number, because the mean of its divisors is an integer number (19883815).

Almost surely, 2^113621780 is an apocalyptic number.

113621780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113621780 is an abundant number, since it is smaller than the sum of its proper divisors (124984000).

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

113621780 is a wasteful number, since it uses less digits than its factorization.

113621780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5681098 (or 5681096 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 113621780 is about 10659.3517626542. The cubic root of 113621780 is about 484.3439317152.

The spelling of 113621780 in words is "one hundred thirteen million, six hundred twenty-one thousand, seven hundred eighty".