56523402 has 72 divisors (see below), whose sum is σ = 140541804. Its totient is φ = 16353792.

The previous prime is 56523359. The next prime is 56523403. The reversal of 56523402 is 20432565.

56523402 is a `hidden beast` number, since 5 + 652 + 3 + 4 + 0 + 2 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 33281361 + 23242041 = 5769^2 + 4821^2 .

It is not an unprimeable number, because it can be changed into a prime (56523403) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51168 + ... + 52260.

Almost surely, 2^56523402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56523402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70270902).

56523402 is an abundant number, since it is smaller than the sum of its proper divisors (84018402).

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

56523402 is a wasteful number, since it uses less digits than its factorization.

56523402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 56523402 is about 7518.2047059122. The cubic root of 56523402 is about 383.7744850989.

Adding to 56523402 its reverse (20432565), we get a palindrome (76955967).

The spelling of 56523402 in words is "fifty-six million, five hundred twenty-three thousand, four hundred two".