630123840 has 112 divisors (see below), whose sum is σ = 2222967360. Its totient is φ = 168030720.

The previous prime is 630123833. The next prime is 630123841. The reversal of 630123840 is 48321036.

It is a happy number.

630123840 is a `hidden beast` number, since 630 + 1 + 23 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630123841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27826 + ... + 45105.

Almost surely, 2^630123840 is an apocalyptic number.

630123840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

630123840 is an abundant number, since it is smaller than the sum of its proper divisors (1592843520).

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

630123840 is a wasteful number, since it uses less digits than its factorization.

630123840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72957 (or 72941 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 630123840 is about 25102.2676266508. The cubic root of 630123840 is about 857.3180556159.

Adding to 630123840 its reverse (48321036), we get a palindrome (678444876).

The spelling of 630123840 in words is "six hundred thirty million, one hundred twenty-three thousand, eight hundred forty".