630545440 has 48 divisors (see below), whose sum is σ = 1702475712. Its totient is φ = 216186624.

The previous prime is 630545423. The next prime is 630545459. The reversal of 630545440 is 44545036.

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, 280374 + ... + 282613.

It is an arithmetic number, because the mean of its divisors is an integer number (35468244).

Almost surely, 2^630545440 is an apocalyptic number.

It is an amenable number.

630545440 is an abundant number, since it is smaller than the sum of its proper divisors (1071930272).

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

630545440 is a wasteful number, since it uses less digits than its factorization.

630545440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563009 (or 563001 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 630545440 is about 25110.6638701568. The cubic root of 630545440 is about 857.5092162989.

The spelling of 630545440 in words is "six hundred thirty million, five hundred forty-five thousand, four hundred forty".