36978591 has 8 divisors (see below), whose sum is σ = 53097520. Its totient is φ = 22756032.

The previous prime is 36978569. The next prime is 36978619. The reversal of 36978591 is 19587963.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36978591 - 2⁵ = 36978559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 36978591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36978511) 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, 474046 + ... + 474123.

It is an arithmetic number, because the mean of its divisors is an integer number (6637190).

Almost surely, 2^36978591 is an apocalyptic number.

36978591 is a deficient number, since it is larger than the sum of its proper divisors (16118929).

36978591 is a wasteful number, since it uses less digits than its factorization.

36978591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948185.

The product of its digits is 408240, while the sum is 48.

The square root of 36978591 is about 6081.0024666991. The cubic root of 36978591 is about 333.1579029109.

The spelling of 36978591 in words is "thirty-six million, nine hundred seventy-eight thousand, five hundred ninety-one".