56238040 has 64 divisors (see below), whose sum is σ = 134991360. Its totient is φ = 21012480.

The previous prime is 56238037. The next prime is 56238067. The reversal of 56238040 is 4083265.

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, 129664 + ... + 130096.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^56238040 is an apocalyptic number.

56238040 is the 4330-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56238040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67495680).

56238040 is an abundant number, since it is smaller than the sum of its proper divisors (78753320).

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

56238040 is a wasteful number, since it uses less digits than its factorization.

56238040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 56238040 is about 7499.2026242795. The cubic root of 56238040 is about 383.1275585362.

The spelling of 56238040 in words is "fifty-six million, two hundred thirty-eight thousand, forty".