91290980 has 24 divisors (see below), whose sum is σ = 209139840. Its totient is φ = 33196640.

The previous prime is 91290977. The next prime is 91291007. The reversal of 91290980 is 8909219.

91290980 is nontrivially palindromic in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207260 + ... + 207699.

It is an arithmetic number, because the mean of its divisors is an integer number (8714160).

Almost surely, 2^91290980 is an apocalyptic number.

It is an amenable number.

91290980 is an abundant number, since it is smaller than the sum of its proper divisors (117848860).

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

91290980 is a wasteful number, since it uses less digits than its factorization.

91290980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414979 (or 414977 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 91290980 is about 9554.6313377335. The cubic root of 91290980 is about 450.2730523899.

The spelling of 91290980 in words is "ninety-one million, two hundred ninety thousand, nine hundred eighty".