630278428 has 24 divisors (see below), whose sum is σ = 1202151888. Its totient is φ = 287390976.

The previous prime is 630278401. The next prime is 630278437. The reversal of 630278428 is 824872036.

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, 68701 + ... + 77332.

It is an arithmetic number, because the mean of its divisors is an integer number (50089662).

Almost surely, 2^630278428 is an apocalyptic number.

It is an amenable number.

630278428 is a deficient number, since it is larger than the sum of its proper divisors (571873460).

630278428 is a wasteful number, since it uses less digits than its factorization.

630278428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146133 (or 146131 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 630278428 is about 25105.3466018695. The cubic root of 630278428 is about 857.3881583685.

The spelling of 630278428 in words is "six hundred thirty million, two hundred seventy-eight thousand, four hundred twenty-eight".