56497440 has 48 divisors (see below), whose sum is σ = 177968448. Its totient is φ = 15065856.

The previous prime is 56497429. The next prime is 56497447. The reversal of 56497440 is 4479465.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56497447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58372 + ... + 59331.

It is an arithmetic number, because the mean of its divisors is an integer number (3707676).

Almost surely, 2^56497440 is an apocalyptic number.

It is an amenable number.

56497440 is an abundant number, since it is smaller than the sum of its proper divisors (121471008).

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

56497440 is a wasteful number, since it uses less digits than its factorization.

56497440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117721 (or 117713 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 56497440 is about 7516.4778985905. The cubic root of 56497440 is about 383.7157184130.

The spelling of 56497440 in words is "fifty-six million, four hundred ninety-seven thousand, four hundred forty".