90121960 has 32 divisors (see below), whose sum is σ = 209318400. Its totient is φ = 34885440.

The previous prime is 90121919. The next prime is 90121961. The reversal of 90121960 is 6912109.

It is not an unprimeable number, because it can be changed into a prime (90121961) 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, 35100 + ... + 37579.

It is an arithmetic number, because the mean of its divisors is an integer number (6541200).

Almost surely, 2^90121960 is an apocalyptic number.

It is an amenable number.

90121960 is an abundant number, since it is smaller than the sum of its proper divisors (119196440).

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

90121960 is a wasteful number, since it uses less digits than its factorization.

90121960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72721 (or 72717 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 90121960 is about 9493.2586607550. The cubic root of 90121960 is about 448.3428099998.

The spelling of 90121960 in words is "ninety million, one hundred twenty-one thousand, nine hundred sixty".