36721986 has 32 divisors (see below), whose sum is σ = 84485760. Its totient is φ = 10423296.

The previous prime is 36721973. The next prime is 36721987. The reversal of 36721986 is 68912763.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (36721987) 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, 3810 + ... + 9378.

It is an arithmetic number, because the mean of its divisors is an integer number (2640180).

Almost surely, 2^36721986 is an apocalyptic number.

36721986 is an abundant number, since it is smaller than the sum of its proper divisors (47763774).

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

36721986 is a wasteful number, since it uses less digits than its factorization.

36721986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5738.

The product of its digits is 108864, while the sum is 42.

The square root of 36721986 is about 6059.8668302200. The cubic root of 36721986 is about 332.3854875420.

The spelling of 36721986 in words is "thirty-six million, seven hundred twenty-one thousand, nine hundred eighty-six".