56623420 has 72 divisors (see below), whose sum is σ = 145650960. Its totient is φ = 18385920.

The previous prime is 56623417. The next prime is 56623507. The reversal of 56623420 is 2432665.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17100 + ... + 20140.

It is an arithmetic number, because the mean of its divisors is an integer number (2022930).

Almost surely, 2^56623420 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 56623420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72825480).

56623420 is an abundant number, since it is smaller than the sum of its proper divisors (89027540).

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

56623420 is a wasteful number, since it uses less digits than its factorization.

56623420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3083 (or 3074 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 56623420 is about 7524.8534869458. The cubic root of 56623420 is about 384.0007143361. Note that the first 3 decimals are identical.

The spelling of 56623420 in words is "fifty-six million, six hundred twenty-three thousand, four hundred twenty".