631256890 has 16 divisors (see below), whose sum is σ = 1239559200. Its totient is φ = 229547920.

The previous prime is 631256887. The next prime is 631256897. The reversal of 631256890 is 98652136.

It is a super-2 number, since 2×631256890² = 796970522344944200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631256897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2869240 + ... + 2869459.

It is an arithmetic number, because the mean of its divisors is an integer number (77472450).

Almost surely, 2^631256890 is an apocalyptic number.

631256890 is a deficient number, since it is larger than the sum of its proper divisors (608302310).

631256890 is a wasteful number, since it uses less digits than its factorization.

631256890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5738717.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 631256890 is about 25124.8261685529. The cubic root of 631256890 is about 857.8316068230.

The spelling of 631256890 in words is "six hundred thirty-one million, two hundred fifty-six thousand, eight hundred ninety".