121927428 has 36 divisors (see below), whose sum is σ = 352235520. Its totient is φ = 34836336.

The previous prime is 121927411. The next prime is 121927441. The reversal of 121927428 is 824729121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 121927392 and 121927401.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 241668 + ... + 242171.

It is an arithmetic number, because the mean of its divisors is an integer number (9784320).

Almost surely, 2^121927428 is an apocalyptic number.

121927428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121927428 is an abundant number, since it is smaller than the sum of its proper divisors (230308092).

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

121927428 is a wasteful number, since it uses less digits than its factorization.

121927428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483856 (or 483851 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 121927428 is about 11042.0753484116. The cubic root of 121927428 is about 495.8692043692.

The spelling of 121927428 in words is "one hundred twenty-one million, nine hundred twenty-seven thousand, four hundred twenty-eight".