630738942 has 8 divisors (see below), whose sum is σ = 1261477896. Its totient is φ = 210246312.

The previous prime is 630738917. The next prime is 630738943. The reversal of 630738942 is 249837036.

It is a sphenic number, since it is the product of 3 distinct primes.

630738942 is an admirable number.

It is a super-2 number, since 2×630738942² = 795663225910558728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 630738894 and 630738903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630738943) 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, 52561573 + ... + 52561584.

It is an arithmetic number, because the mean of its divisors is an integer number (157684737).

Almost surely, 2^630738942 is an apocalyptic number.

630738942 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

630738942 is a wasteful number, since it uses less digits than its factorization.

630738942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105123162.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 630738942 is about 25114.5165591536. The cubic root of 630738942 is about 857.5969249012.

The spelling of 630738942 in words is "six hundred thirty million, seven hundred thirty-eight thousand, nine hundred forty-two".