631461440 has 28 divisors (see below), whose sum is σ = 1503668316. Its totient is φ = 252584448.

The previous prime is 631461437. The next prime is 631461449. The reversal of 631461440 is 44164136.

It can be written as a sum of positive squares in 2 ways, for example, as 145347136 + 486114304 = 12056^2 + 22048^2 .

It is not an unprimeable number, because it can be changed into a prime (631461449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 986339 + ... + 986978.

Almost surely, 2^631461440 is an apocalyptic number.

It is an amenable number.

631461440 is an abundant number, since it is smaller than the sum of its proper divisors (872206876).

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

631461440 is a wasteful number, since it uses less digits than its factorization.

631461440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973334 (or 1973324 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 631461440 is about 25128.8965137747. The cubic root of 631461440 is about 857.9242529436.

The spelling of 631461440 in words is "six hundred thirty-one million, four hundred sixty-one thousand, four hundred forty".