631986492 has 96 divisors (see below), whose sum is σ = 1621408320. Its totient is φ = 190771200.

The previous prime is 631986463. The next prime is 631986517. The reversal of 631986492 is 294689136.

It is a super-3 number, since 3×631986492³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 761934 + ... + 762762.

It is an arithmetic number, because the mean of its divisors is an integer number (16889670).

Almost surely, 2^631986492 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 631986492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810704160).

631986492 is an abundant number, since it is smaller than the sum of its proper divisors (989421828).

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

631986492 is a wasteful number, since it uses less digits than its factorization.

631986492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991 (or 989 counting only the distinct ones).

The product of its digits is 559872, while the sum is 48.

The square root of 631986492 is about 25139.3415188226. The cubic root of 631986492 is about 858.1619713667.

The spelling of 631986492 in words is "six hundred thirty-one million, nine hundred eighty-six thousand, four hundred ninety-two".