56189440 has 80 divisors (see below), whose sum is σ = 137884032. Its totient is φ = 21950464.

The previous prime is 56189389. The next prime is 56189449. The reversal of 56189440 is 4498165.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 56189440.

It is not an unprimeable number, because it can be changed into a prime (56189449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120087 + ... + 120553.

Almost surely, 2^56189440 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 56189440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68942016).

56189440 is an abundant number, since it is smaller than the sum of its proper divisors (81694592).

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

56189440 is an equidigital number, since it uses as much as digits as its factorization.

56189440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 521 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 56189440 is about 7495.9615794106. The cubic root of 56189440 is about 383.0171625265.

The spelling of 56189440 in words is "fifty-six million, one hundred eighty-nine thousand, four hundred forty".