91250628 has 48 divisors (see below), whose sum is σ = 257652864. Its totient is φ = 24537600.

The previous prime is 91250623. The next prime is 91250647. The reversal of 91250628 is 82605219.

It is a super-2 number, since 2×91250628² = 16653354220788768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91250623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30523 + ... + 33378.

It is an arithmetic number, because the mean of its divisors is an integer number (5367768).

Almost surely, 2^91250628 is an apocalyptic number.

It is an amenable number.

91250628 is an abundant number, since it is smaller than the sum of its proper divisors (166402236).

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

91250628 is a wasteful number, since it uses less digits than its factorization.

91250628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63932 (or 63930 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 91250628 is about 9552.5194582372. The cubic root of 91250628 is about 450.2067001029.

The spelling of 91250628 in words is "ninety-one million, two hundred fifty thousand, six hundred twenty-eight".