120915890 has 8 divisors (see below), whose sum is σ = 217648620. Its totient is φ = 48366352.

The previous prime is 120915869. The next prime is 120915901. The reversal of 120915890 is 98519021.

It can be written as a sum of positive squares in 2 ways, for example, as 117570649 + 3345241 = 10843^2 + 1829^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 120915890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6045785 + ... + 6045804.

Almost surely, 2^120915890 is an apocalyptic number.

120915890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120915890 is a deficient number, since it is larger than the sum of its proper divisors (96732730).

120915890 is a wasteful number, since it uses less digits than its factorization.

120915890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12091596.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 120915890 is about 10996.1761535545. The cubic root of 120915890 is about 494.4941129623.

The spelling of 120915890 in words is "one hundred twenty million, nine hundred fifteen thousand, eight hundred ninety".