120731890 has 16 divisors (see below), whose sum is σ = 228755520. Its totient is φ = 45750960.

The previous prime is 120731881. The next prime is 120731893. The reversal of 120731890 is 98137021.

It is not an unprimeable number, because it can be changed into a prime (120731893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317526 + ... + 317905.

It is an arithmetic number, because the mean of its divisors is an integer number (14297220).

Almost surely, 2^120731890 is an apocalyptic number.

120731890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120731890 is a deficient number, since it is larger than the sum of its proper divisors (108023630).

120731890 is a wasteful number, since it uses less digits than its factorization.

120731890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635457.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 120731890 is about 10987.8064234860. The cubic root of 120731890 is about 494.2431586060.

The spelling of 120731890 in words is "one hundred twenty million, seven hundred thirty-one thousand, eight hundred ninety".