561390630 has 32 divisors (see below), whose sum is σ = 1349447904. Its totient is φ = 149469696.

The previous prime is 561390619. The next prime is 561390631. The reversal of 561390630 is 36093165.

It is a junction number, because it is equal to n+sod(n) for n = 561390591 and 561390600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561390631) 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, 5262 + ... + 33918.

It is an arithmetic number, because the mean of its divisors is an integer number (42170247).

Almost surely, 2^561390630 is an apocalyptic number.

561390630 is an abundant number, since it is smaller than the sum of its proper divisors (788057274).

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

561390630 is a wasteful number, since it uses less digits than its factorization.

561390630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29320.

The product of its (nonzero) digits is 14580, while the sum is 33.

The square root of 561390630 is about 23693.6833354377. The cubic root of 561390630 is about 824.9387796629.

The spelling of 561390630 in words is "five hundred sixty-one million, three hundred ninety thousand, six hundred thirty".