121628580 has 48 divisors (see below), whose sum is σ = 343883904. Its totient is φ = 32117760.

The previous prime is 121628579. The next prime is 121628641. The reversal of 121628580 is 85826121.

It is a super-2 number, since 2×121628580² = 29587022945632800, which contains 22 as substring.

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, 3661 + ... + 16020.

It is an arithmetic number, because the mean of its divisors is an integer number (7164248).

Almost surely, 2^121628580 is an apocalyptic number.

121628580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121628580 is an abundant number, since it is smaller than the sum of its proper divisors (222255324).

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

121628580 is a wasteful number, since it uses less digits than its factorization.

121628580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19796 (or 19794 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 121628580 is about 11028.5348074892. The cubic root of 121628580 is about 495.4637425303.

The spelling of 121628580 in words is "one hundred twenty-one million, six hundred twenty-eight thousand, five hundred eighty".