91650228 has 24 divisors (see below), whose sum is σ = 215970720. Its totient is φ = 30247200.

The previous prime is 91650227. The next prime is 91650257. The reversal of 91650228 is 82205619.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91650227) 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, 36598 + ... + 39021.

It is an arithmetic number, because the mean of its divisors is an integer number (8998780).

Almost surely, 2^91650228 is an apocalyptic number.

It is an amenable number.

91650228 is an abundant number, since it is smaller than the sum of its proper divisors (124320492).

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

91650228 is a wasteful number, since it uses less digits than its factorization.

91650228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75727 (or 75725 counting only the distinct ones).

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

The square root of 91650228 is about 9573.4125577038. The cubic root of 91650228 is about 450.8629170577.

The spelling of 91650228 in words is "ninety-one million, six hundred fifty thousand, two hundred twenty-eight".