561896420 has 12 divisors (see below), whose sum is σ = 1179982524. Its totient is φ = 224758560.

The previous prime is 561896411. The next prime is 561896429. The reversal of 561896420 is 24698165.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (561896411) and next prime (561896429).

It can be written as a sum of positive squares in 2 ways, for example, as 320839744 + 241056676 = 17912^2 + 15526^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (561896429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14047391 + ... + 14047430.

It is an arithmetic number, because the mean of its divisors is an integer number (98331877).

Almost surely, 2^561896420 is an apocalyptic number.

It is an amenable number.

561896420 is an abundant number, since it is smaller than the sum of its proper divisors (618086104).

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

561896420 is a wasteful number, since it uses less digits than its factorization.

561896420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28094830 (or 28094828 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 561896420 is about 23704.3544522942. The cubic root of 561896420 is about 825.1864506657.

The spelling of 561896420 in words is "five hundred sixty-one million, eight hundred ninety-six thousand, four hundred twenty".