91490252 has 18 divisors (see below), whose sum is σ = 186248412. Its totient is φ = 39210024.

The previous prime is 91490249. The next prime is 91490261. The reversal of 91490252 is 25209419.

It is a super-2 number, since 2×91490252² = 16740932422047008, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 233198 + ... + 233589.

It is an arithmetic number, because the mean of its divisors is an integer number (10347134).

Almost surely, 2^91490252 is an apocalyptic number.

It is an amenable number.

91490252 is an abundant number, since it is smaller than the sum of its proper divisors (94758160).

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

91490252 is a wasteful number, since it uses less digits than its factorization.

91490252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466805 (or 466796 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 91490252 is about 9565.0536851604. The cubic root of 91490252 is about 450.6004363398.

The spelling of 91490252 in words is "ninety-one million, four hundred ninety thousand, two hundred fifty-two".