56523420 has 240 divisors, whose sum is σ = 194660928. Its totient is φ = 13685760.

The previous prime is 56523409. The next prime is 56523421. The reversal of 56523420 is 2432565.

56523420 is a `hidden beast` number, since 5 + 652 + 3 + 4 + 2 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56523421) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1378600 + ... + 1378640.

Almost surely, 2^56523420 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 56523420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97330464).

56523420 is an abundant number, since it is smaller than the sum of its proper divisors (138137508).

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

56523420 is a wasteful number, since it uses less digits than its factorization.

56523420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 111 counting only the distinct ones).

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

The square root of 56523420 is about 7518.2059030064. The cubic root of 56523420 is about 383.7745258369.

Adding to 56523420 its reverse (2432565), we get a palindrome (58955985).

The spelling of 56523420 in words is "fifty-six million, five hundred twenty-three thousand, four hundred twenty".