561306402 has 32 divisors (see below), whose sum is σ = 1248955200. Its totient is φ = 186861024.

The previous prime is 561306401. The next prime is 561306409. The reversal of 561306402 is 204603165.

561306402 is a `hidden beast` number, since 5 + 6 + 13 + 0 + 640 + 2 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (561306401) 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, 38374 + ... + 50942.

It is an arithmetic number, because the mean of its divisors is an integer number (39029850).

Almost surely, 2^561306402 is an apocalyptic number.

561306402 is an abundant number, since it is smaller than the sum of its proper divisors (687648798).

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

561306402 is a wasteful number, since it uses less digits than its factorization.

561306402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13407 (or 13401 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 561306402 is about 23691.9058330055. The cubic root of 561306402 is about 824.8975211552.

Adding to 561306402 its reverse (204603165), we get a palindrome (765909567).

The spelling of 561306402 in words is "five hundred sixty-one million, three hundred six thousand, four hundred two".