36645138 has 12 divisors (see below), whose sum is σ = 79397838. Its totient is φ = 12215040.

The previous prime is 36645137. The next prime is 36645139. The reversal of 36645138 is 83154663.

36645138 is a `hidden beast` number, since 3 + 6 + 645 + 1 + 3 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (36645137) and next prime (36645139).

It can be written as a sum of positive squares in only one way, i.e., 25735329 + 10909809 = 5073^2 + 3303^2 .

It is a super-2 number, since 2×36645138² = 2685732278078088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (36645137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1017903 + ... + 1017938.

Almost surely, 2^36645138 is an apocalyptic number.

36645138 is an abundant number, since it is smaller than the sum of its proper divisors (42752700).

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

36645138 is a wasteful number, since it uses less digits than its factorization.

36645138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035849 (or 2035846 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 36645138 is about 6053.5227760371. The cubic root of 36645138 is about 332.1534648810.

The spelling of 36645138 in words is "thirty-six million, six hundred forty-five thousand, one hundred thirty-eight".