3640252538 has 8 divisors (see below), whose sum is σ = 5880407988. Its totient is φ = 1680116544.

The previous prime is 3640252523. The next prime is 3640252543. The reversal of 3640252538 is 8352520463.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3377585689 + 262666849 = 58117^2 + 16207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70004831 + ... + 70004882.

Almost surely, 2^3640252538 is an apocalyptic number.

3640252538 is a deficient number, since it is larger than the sum of its proper divisors (2240155450).

3640252538 is a wasteful number, since it uses less digits than its factorization.

3640252538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140009728.

The product of its (nonzero) digits is 172800, while the sum is 38.

The square root of 3640252538 is about 60334.5053679899. The cubic root of 3640252538 is about 1538.3099097989.

The spelling of 3640252538 in words is "three billion, six hundred forty million, two hundred fifty-two thousand, five hundred thirty-eight".