561957396 has 144 divisors (see below), whose sum is σ = 1774292352. Its totient is φ = 134703360.

The previous prime is 561957377. The next prime is 561957421. The reversal of 561957396 is 693759165.

It is a super-2 number, since 2×561957396² = 631592229838201632, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 130006 + ... + 134258.

Almost surely, 2^561957396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561957396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887146176).

561957396 is an abundant number, since it is smaller than the sum of its proper divisors (1212334956).

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

561957396 is a wasteful number, since it uses less digits than its factorization.

561957396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4302 (or 4289 counting only the distinct ones).

The product of its digits is 1530900, while the sum is 51.

The square root of 561957396 is about 23705.6405945927. The cubic root of 561957396 is about 825.2162988413.

The spelling of 561957396 in words is "five hundred sixty-one million, nine hundred fifty-seven thousand, three hundred ninety-six".