630724138 has 16 divisors (see below), whose sum is σ = 1044531936. Its totient is φ = 283237840.

The previous prime is 630724121. The next prime is 630724139. The reversal of 630724138 is 831427036.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (630724139) 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, 170881 + ... + 174532.

It is an arithmetic number, because the mean of its divisors is an integer number (65283246).

Almost surely, 2^630724138 is an apocalyptic number.

630724138 is a deficient number, since it is larger than the sum of its proper divisors (413807798).

630724138 is a wasteful number, since it uses less digits than its factorization.

630724138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345509.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 630724138 is about 25114.2218274825. The cubic root of 630724138 is about 857.5902153296.

The spelling of 630724138 in words is "six hundred thirty million, seven hundred twenty-four thousand, one hundred thirty-eight".