56999040 has 128 divisors (see below), whose sum is σ = 207688320. Its totient is φ = 13025280.

The previous prime is 56999039. The next prime is 56999051. The reversal of 56999040 is 4099965.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 56998983 and 56999001.

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, 11320 + ... + 15560.

It is an arithmetic number, because the mean of its divisors is an integer number (1622565).

Almost surely, 2^56999040 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 56999040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103844160).

56999040 is an abundant number, since it is smaller than the sum of its proper divisors (150689280).

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

56999040 is a wasteful number, since it uses less digits than its factorization.

56999040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4270 (or 4258 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 56999040 is about 7549.7708574499. The cubic root of 56999040 is about 384.8479525535.

The spelling of 56999040 in words is "fifty-six million, nine hundred ninety-nine thousand, forty".