56724920 has 96 divisors (see below), whose sum is σ = 155170080. Its totient is φ = 18278400.

The previous prime is 56724919. The next prime is 56724949. The reversal of 56724920 is 2942765.

56724920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80570 + ... + 81270.

It is an arithmetic number, because the mean of its divisors is an integer number (1616355).

Almost surely, 2^56724920 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 56724920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77585040).

56724920 is an abundant number, since it is smaller than the sum of its proper divisors (98445160).

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

56724920 is a wasteful number, since it uses less digits than its factorization.

56724920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753 (or 732 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 56724920 is about 7531.5947846389. The cubic root of 56724920 is about 384.2300234976.

The spelling of 56724920 in words is "fifty-six million, seven hundred twenty-four thousand, nine hundred twenty".