112787820 has 36 divisors (see below), whose sum is σ = 342123600. Its totient is φ = 30076704.

The previous prime is 112787777. The next prime is 112787821. The reversal of 112787820 is 28787211.

It is a happy number.

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

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

It is not an unprimeable number, because it can be changed into a prime (112787821) 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, 313120 + ... + 313479.

Almost surely, 2^112787820 is an apocalyptic number.

112787820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

112787820 is an abundant number, since it is smaller than the sum of its proper divisors (229335780).

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

112787820 is a wasteful number, since it uses less digits than its factorization.

112787820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626614 (or 626609 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 112787820 is about 10620.1610157285. The cubic root of 112787820 is about 483.1560263899.

The spelling of 112787820 in words is "one hundred twelve million, seven hundred eighty-seven thousand, eight hundred twenty".