3640724131 has 8 divisors (see below), whose sum is σ = 4205328624. Its totient is φ = 3115057920.

The previous prime is 3640724117. The next prime is 3640724161. The reversal of 3640724131 is 1314270463.

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

It is a cyclic number.

It is not a de Polignac number, because 3640724131 - 2¹¹ = 3640722083 is a prime.

It is a super-2 number, since 2×3640724131² = 26509744396091410322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3640724093 and 3640724102.

It is not an unprimeable number, because it can be changed into a prime (3640724111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9734370 + ... + 9734743.

It is an arithmetic number, because the mean of its divisors is an integer number (525666078).

Almost surely, 2^3640724131 is an apocalyptic number.

3640724131 is a deficient number, since it is larger than the sum of its proper divisors (564604493).

3640724131 is a wasteful number, since it uses less digits than its factorization.

3640724131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19469141.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 3640724131 is about 60338.4133947852. The cubic root of 3640724131 is about 1538.3763360383.

Adding to 3640724131 its reverse (1314270463), we get a palindrome (4954994594).

The spelling of 3640724131 in words is "three billion, six hundred forty million, seven hundred twenty-four thousand, one hundred thirty-one".