113181780 has 72 divisors (see below), whose sum is σ = 328360032. Its totient is φ = 29128064.

The previous prime is 113181769. The next prime is 113181793. The reversal of 113181780 is 87181311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49339 + ... + 51581.

It is an arithmetic number, because the mean of its divisors is an integer number (4560556).

Almost surely, 2^113181780 is an apocalyptic number.

113181780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 113181780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164180016).

113181780 is an abundant number, since it is smaller than the sum of its proper divisors (215178252).

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

113181780 is a wasteful number, since it uses less digits than its factorization.

113181780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2313 (or 2282 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 30.

The square root of 113181780 is about 10638.6925888476. The cubic root of 113181780 is about 483.7179161329.

The spelling of 113181780 in words is "one hundred thirteen million, one hundred eighty-one thousand, seven hundred eighty".