91886372 has 6 divisors (see below), whose sum is σ = 160801158. Its totient is φ = 45943184.

The previous prime is 91886329. The next prime is 91886419. The reversal of 91886372 is 27368819.

It can be written as a sum of positive squares in only one way, i.e., 84345856 + 7540516 = 9184^2 + 2746^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11485793 + ... + 11485800.

It is an arithmetic number, because the mean of its divisors is an integer number (26800193).

Almost surely, 2^91886372 is an apocalyptic number.

It is an amenable number.

91886372 is a deficient number, since it is larger than the sum of its proper divisors (68914786).

91886372 is a wasteful number, since it uses less digits than its factorization.

91886372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22971597 (or 22971595 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 91886372 is about 9585.7379475969. The cubic root of 91886372 is about 451.2498128467.

The spelling of 91886372 in words is "ninety-one million, eight hundred eighty-six thousand, three hundred seventy-two".