631340892 has 480 divisors, whose sum is σ = 2276736000. Its totient is φ = 150885504.

The previous prime is 631340861. The next prime is 631340909. The reversal of 631340892 is 298043136.

It is a super-2 number, since 2×631340892² = 797182643822711328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 27449593 + ... + 27449615.

It is an arithmetic number, because the mean of its divisors is an integer number (4743200).

Almost surely, 2^631340892 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 631340892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1138368000).

631340892 is an abundant number, since it is smaller than the sum of its proper divisors (1645395108).

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

631340892 is a wasteful number, since it uses less digits than its factorization.

631340892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 631340892 is about 25126.4978061010. The cubic root of 631340892 is about 857.8696559784.

The spelling of 631340892 in words is "six hundred thirty-one million, three hundred forty thousand, eight hundred ninety-two".