91287372 has 48 divisors (see below), whose sum is σ = 233154432. Its totient is φ = 27569280.

The previous prime is 91287349. The next prime is 91287407. The reversal of 91287372 is 27378219.

It is a self number, because there is not a number n which added to its sum of digits gives 91287372.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44808 + ... + 46800.

It is an arithmetic number, because the mean of its divisors is an integer number (4857384).

Almost surely, 2^91287372 is an apocalyptic number.

It is an amenable number.

91287372 is an abundant number, since it is smaller than the sum of its proper divisors (141867060).

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

91287372 is a wasteful number, since it uses less digits than its factorization.

91287372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2358 (or 2356 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 91287372 is about 9554.4425269086. The cubic root of 91287372 is about 450.2671204180.

The spelling of 91287372 in words is "ninety-one million, two hundred eighty-seven thousand, three hundred seventy-two".