630879840 has 120 divisors (see below), whose sum is σ = 2226525840. Its totient is φ = 168231168.

The previous prime is 630879787. The next prime is 630879863. The reversal of 630879840 is 48978036.

It is a happy number.

630879840 is a `hidden beast` number, since 630 + 8 + 7 + 9 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11380 + ... + 37299.

It is an arithmetic number, because the mean of its divisors is an integer number (18554382).

Almost surely, 2^630879840 is an apocalyptic number.

630879840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

630879840 is an abundant number, since it is smaller than the sum of its proper divisors (1595646000).

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

630879840 is a wasteful number, since it uses less digits than its factorization.

630879840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48706 (or 48689 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 630879840 is about 25117.3215132506. The cubic root of 630879840 is about 857.6607784160.

It can be divided in two parts, 63087 and 9840, that added together give a palindrome (72927).

The spelling of 630879840 in words is "six hundred thirty million, eight hundred seventy-nine thousand, eight hundred forty".