631399692 has 288 divisors, whose sum is σ = 2000388096. Its totient is φ = 153014400.

The previous prime is 631399633. The next prime is 631399711. The reversal of 631399692 is 296993136.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 9423843 + ... + 9423909.

It is an arithmetic number, because the mean of its divisors is an integer number (6945792).

Almost surely, 2^631399692 is an apocalyptic number.

631399692 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631399692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1000194048).

631399692 is an abundant number, since it is smaller than the sum of its proper divisors (1368988404).

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

631399692 is a wasteful number, since it uses less digits than its factorization.

631399692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 168 counting only the distinct ones).

The product of its digits is 472392, while the sum is 48.

The square root of 631399692 is about 25127.6678583588. The cubic root of 631399692 is about 857.8962877450.

The spelling of 631399692 in words is "six hundred thirty-one million, three hundred ninety-nine thousand, six hundred ninety-two".