630726057 has 12 divisors (see below), whose sum is σ = 981129604. Its totient is φ = 388139040.

The previous prime is 630725951. The next prime is 630726073. The reversal of 630726057 is 750627036.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 79227801 + 551498256 = 8901^2 + 23484^2 .

It is not a de Polignac number, because 630726057 - 2⁷ = 630725929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (630726077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2695294 + ... + 2695527.

Almost surely, 2^630726057 is an apocalyptic number.

It is an amenable number.

630726057 is a deficient number, since it is larger than the sum of its proper divisors (350403547).

630726057 is a wasteful number, since it uses less digits than its factorization.

630726057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390840 (or 5390837 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The square root of 630726057 is about 25114.2600328976. The cubic root of 630726057 is about 857.5910850781.

The spelling of 630726057 in words is "six hundred thirty million, seven hundred twenty-six thousand, fifty-seven".