36581994 has 24 divisors (see below), whose sum is σ = 83924100. Its totient is φ = 11476608.

The previous prime is 36581959. The next prime is 36581999. The reversal of 36581994 is 49918563.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35247969 + 1334025 = 5937^2 + 1155^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (36581999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59469 + ... + 60080.

Almost surely, 2^36581994 is an apocalyptic number.

36581994 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

36581994 is an abundant number, since it is smaller than the sum of its proper divisors (47342106).

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

36581994 is a wasteful number, since it uses less digits than its factorization.

36581994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119574 (or 119571 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 36581994 is about 6048.3050518306. The cubic root of 36581994 is about 331.9625750140.

The spelling of 36581994 in words is "thirty-six million, five hundred eighty-one thousand, nine hundred ninety-four".