631628782 has 16 divisors (see below), whose sum is σ = 979115904. Its totient is φ = 305598000.

The previous prime is 631628771. The next prime is 631628797. The reversal of 631628782 is 287826136.

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, 54282 + ... + 64882.

It is an arithmetic number, because the mean of its divisors is an integer number (61194744).

Almost surely, 2^631628782 is an apocalyptic number.

631628782 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

631628782 is a deficient number, since it is larger than the sum of its proper divisors (347487122).

631628782 is an equidigital number, since it uses as much as digits as its factorization.

631628782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10696 (or 10634 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 631628782 is about 25132.2259658789. The cubic root of 631628782 is about 858.0000316958. Note that the first 4 decimals are identical.

The spelling of 631628782 in words is "six hundred thirty-one million, six hundred twenty-eight thousand, seven hundred eighty-two".