120531780 has 48 divisors (see below), whose sum is σ = 374989440. Its totient is φ = 32141664.

The previous prime is 120531773. The next prime is 120531793. The reversal of 120531780 is 87135021.

120531780 is a `hidden beast` number, since 120 + 531 + 7 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111064 + ... + 112143.

It is an arithmetic number, because the mean of its divisors is an integer number (7812280).

Almost surely, 2^120531780 is an apocalyptic number.

120531780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120531780 is an abundant number, since it is smaller than the sum of its proper divisors (254457660).

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

120531780 is a wasteful number, since it uses less digits than its factorization.

120531780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223225 (or 223217 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 120531780 is about 10978.6966439555. The cubic root of 120531780 is about 493.9699424963.

The spelling of 120531780 in words is "one hundred twenty million, five hundred thirty-one thousand, seven hundred eighty".