36639252 has 72 divisors (see below), whose sum is σ = 101104640. Its totient is φ = 11119680.

The previous prime is 36639227. The next prime is 36639257. The reversal of 36639252 is 25293663.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36639257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36477 + ... + 37467.

Almost surely, 2^36639252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36639252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50552320).

36639252 is an abundant number, since it is smaller than the sum of its proper divisors (64465388).

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

36639252 is a wasteful number, since it uses less digits than its factorization.

36639252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093 (or 1088 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 36639252 is about 6053.0365933141. The cubic root of 36639252 is about 332.1356802572.

The spelling of 36639252 in words is "thirty-six million, six hundred thirty-nine thousand, two hundred fifty-two".