36991806 has 16 divisors (see below), whose sum is σ = 74046864. Its totient is φ = 12320064.

The previous prime is 36991789. The next prime is 36991811. The reversal of 36991806 is 60819963.

It is a super-2 number, since 2×36991806² = 2736787422283272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8760 + ... + 12276.

It is an arithmetic number, because the mean of its divisors is an integer number (4627929).

Almost surely, 2^36991806 is an apocalyptic number.

36991806 is an abundant number, since it is smaller than the sum of its proper divisors (37055058).

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

36991806 is a wasteful number, since it uses less digits than its factorization.

36991806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5275.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 36991806 is about 6082.0889503525. The cubic root of 36991806 is about 333.1975849469.

The spelling of 36991806 in words is "thirty-six million, nine hundred ninety-one thousand, eight hundred six".