4636391872 has 42 divisors (see below), whose sum is σ = 10517943912. Its totient is φ = 1986407424.

The previous prime is 4636391857. The next prime is 4636391887. The reversal of 4636391872 is 2781936364.

It is an interprime number because it is at equal distance from previous prime (4636391857) and next prime (4636391887).

It is a super-2 number, since 2×4636391872² = 42992259181495328768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1439608 + ... + 1442824.

It is an arithmetic number, because the mean of its divisors is an integer number (250427236).

Almost surely, 2^4636391872 is an apocalyptic number.

It is an amenable number.

4636391872 is an abundant number, since it is smaller than the sum of its proper divisors (5881552040).

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

4636391872 is an frugal number, since it uses more digits than its factorization.

4636391872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6453 (or 3226 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 4636391872 is about 68091.0557415583. The cubic root of 4636391872 is about 1667.4777409822.

The spelling of 4636391872 in words is "four billion, six hundred thirty-six million, three hundred ninety-one thousand, eight hundred seventy-two".