56019840 has 128 divisors (see below), whose sum is σ = 180662400. Its totient is φ = 14764032.

The previous prime is 56019833. The next prime is 56019857. The reversal of 56019840 is 4891065.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312871 + ... + 313049.

It is an arithmetic number, because the mean of its divisors is an integer number (1411425).

Almost surely, 2^56019840 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 56019840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90331200).

56019840 is an abundant number, since it is smaller than the sum of its proper divisors (124642560).

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

56019840 is a wasteful number, since it uses less digits than its factorization.

56019840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 56019840 is about 7484.6402719169. The cubic root of 56019840 is about 382.6314128325.

The spelling of 56019840 in words is "fifty-six million, nineteen thousand, eight hundred forty".