3649986431 has 24 divisors (see below), whose sum is σ = 4813184880. Its totient is φ = 2735897472.

The previous prime is 3649986427. The next prime is 3649986433. The reversal of 3649986431 is 1346899463.

It is not a de Polignac number, because 3649986431 - 2² = 3649986427 is a prime.

It is a super-2 number, since 2×3649986431² = 26644801892968235522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649986433) 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, 138686 + ... + 162891.

It is an arithmetic number, because the mean of its divisors is an integer number (200549370).

Almost surely, 2^3649986431 is an apocalyptic number.

3649986431 is a deficient number, since it is larger than the sum of its proper divisors (1163198449).

3649986431 is a wasteful number, since it uses less digits than its factorization.

3649986431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301623 (or 301616 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 53.

The square root of 3649986431 is about 60415.1175700255. The cubic root of 3649986431 is about 1539.6798163549.

The spelling of 3649986431 in words is "three billion, six hundred forty-nine million, nine hundred eighty-six thousand, four hundred thirty-one".