630843864 has 32 divisors (see below), whose sum is σ = 1802411520. Its totient is φ = 180241056.

The previous prime is 630843847. The next prime is 630843869. The reversal of 630843864 is 468348036.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630843869) 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, 1877344 + ... + 1877679.

It is an arithmetic number, because the mean of its divisors is an integer number (56325360).

Almost surely, 2^630843864 is an apocalyptic number.

It is an amenable number.

630843864 is an abundant number, since it is smaller than the sum of its proper divisors (1171567656).

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

630843864 is a wasteful number, since it uses less digits than its factorization.

630843864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3755039 (or 3755035 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The square root of 630843864 is about 25116.6053438756. The cubic root of 630843864 is about 857.6444753692.

The spelling of 630843864 in words is "six hundred thirty million, eight hundred forty-three thousand, eight hundred sixty-four".