121028790 has 64 divisors (see below), whose sum is σ = 296755200. Its totient is φ = 31584384.

The previous prime is 121028777. The next prime is 121028833. The reversal of 121028790 is 97820121.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 528396 + ... + 528624.

It is an arithmetic number, because the mean of its divisors is an integer number (4636800).

Almost surely, 2^121028790 is an apocalyptic number.

121028790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121028790 is an abundant number, since it is smaller than the sum of its proper divisors (175726410).

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

121028790 is a wasteful number, since it uses less digits than its factorization.

121028790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 121028790 is about 11001.3085585307. The cubic root of 121028790 is about 494.6479692740.

The spelling of 121028790 in words is "one hundred twenty-one million, twenty-eight thousand, seven hundred ninety".