631245340 has 24 divisors (see below), whose sum is σ = 1446126192. Its totient is φ = 229543680.

The previous prime is 631245337. The next prime is 631245359. The reversal of 631245340 is 43542136.

It is a junction number, because it is equal to n+sod(n) for n = 631245299 and 631245308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434429 + ... + 1434868.

It is an arithmetic number, because the mean of its divisors is an integer number (60255258).

Almost surely, 2^631245340 is an apocalyptic number.

It is an amenable number.

631245340 is an abundant number, since it is smaller than the sum of its proper divisors (814880852).

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

631245340 is a wasteful number, since it uses less digits than its factorization.

631245340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869317 (or 2869315 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 631245340 is about 25124.5963151649. The cubic root of 631245340 is about 857.8263749247.

Adding to 631245340 its reverse (43542136), we get a palindrome (674787476).

The spelling of 631245340 in words is "six hundred thirty-one million, two hundred forty-five thousand, three hundred forty".