56199440 has 40 divisors (see below), whose sum is σ = 142544448. Its totient is φ = 20435840.

The previous prime is 56199439. The next prime is 56199443. The reversal of 56199440 is 4499165.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 56199394 and 56199403.

It is not an unprimeable number, because it can be changed into a prime (56199443) 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, 31052 + ... + 32811.

Almost surely, 2^56199440 is an apocalyptic number.

It is an amenable number.

56199440 is an abundant number, since it is smaller than the sum of its proper divisors (86345008).

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

56199440 is a wasteful number, since it uses less digits than its factorization.

56199440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63887 (or 63881 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 56199440 is about 7496.6285755665. The cubic root of 56199440 is about 383.0398829548.

It can be divided in two parts, 561 and 99440, that added together give a palindrome (100001).

The spelling of 56199440 in words is "fifty-six million, one hundred ninety-nine thousand, four hundred forty".