431213636 has 48 divisors (see below), whose sum is σ = 928190592. Its totient is φ = 171072000.

The previous prime is 431213603. The next prime is 431213659. The reversal of 431213636 is 636312134.

It is a super-3 number, since 3×431213636³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 431213599 and 431213608.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21611 + ... + 36461.

It is an arithmetic number, because the mean of its divisors is an integer number (19337304).

Almost surely, 2^431213636 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 431213636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464095296).

431213636 is an abundant number, since it is smaller than the sum of its proper divisors (496976956).

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

431213636 is a wasteful number, since it uses less digits than its factorization.

431213636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14940 (or 14938 counting only the distinct ones).

The product of its digits is 7776, while the sum is 29.

The square root of 431213636 is about 20765.6840966051. The cubic root of 431213636 is about 755.4936677522.

The spelling of 431213636 in words is "four hundred thirty-one million, two hundred thirteen thousand, six hundred thirty-six".