56191440 has 40 divisors (see below), whose sum is σ = 174194208. Its totient is φ = 14984320.

The previous prime is 56191433. The next prime is 56191441. The reversal of 56191440 is 4419165.

It is a happy number.

56191440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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 = 56191398 and 56191407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56191441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116826 + ... + 117305.

Almost surely, 2^56191440 is an apocalyptic number.

It is an amenable number.

56191440 is an abundant number, since it is smaller than the sum of its proper divisors (118002768).

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

56191440 is a wasteful number, since it uses less digits than its factorization.

56191440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234147 (or 234141 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 56191440 is about 7496.0949833897. The cubic root of 56191440 is about 383.0217068278.

The spelling of 56191440 in words is "fifty-six million, one hundred ninety-one thousand, four hundred forty".