56447040 has 112 divisors (see below), whose sum is σ = 193048128. Its totient is φ = 13891584.

The previous prime is 56447033. The next prime is 56447051. The reversal of 56447040 is 4074465.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 56446989 and 56447007.

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, 10219 + ... + 14741.

It is an arithmetic number, because the mean of its divisors is an integer number (1723644).

Almost surely, 2^56447040 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 56447040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96524064).

56447040 is an abundant number, since it is smaller than the sum of its proper divisors (136601088).

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

56447040 is a wasteful number, since it uses less digits than its factorization.

56447040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556 (or 4546 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 56447040 is about 7513.1245164712. The cubic root of 56447040 is about 383.6015832961.

The spelling of 56447040 in words is "fifty-six million, four hundred forty-seven thousand, forty".