120831900 has 144 divisors (see below), whose sum is σ = 403140864. Its totient is φ = 27371520.

The previous prime is 120831889. The next prime is 120831901. The reversal of 120831900 is 9138021.

It is a super-2 number, since 2×120831900² = 29200696115220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120831901) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 342124 + ... + 342476.

Almost surely, 2^120831900 is an apocalyptic number.

120831900 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 120831900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (201570432).

120831900 is an abundant number, since it is smaller than the sum of its proper divisors (282308964).

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

120831900 is a wasteful number, since it uses less digits than its factorization.

120831900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 120831900 is about 10992.3564352690. The cubic root of 120831900 is about 494.3795920871.

Adding to 120831900 its reverse (9138021), we get a palindrome (129969921).

The spelling of 120831900 in words is "one hundred twenty million, eight hundred thirty-one thousand, nine hundred".