56397489 has 16 divisors (see below), whose sum is σ = 79072320. Its totient is φ = 35703360.

The previous prime is 56397487. The next prime is 56397503. The reversal of 56397489 is 98479365.

It is not a de Polignac number, because 56397489 - 2¹ = 56397487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56397487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7 + ... + 10620.

It is an arithmetic number, because the mean of its divisors is an integer number (4942020).

Almost surely, 2^56397489 is an apocalyptic number.

It is an amenable number.

56397489 is a deficient number, since it is larger than the sum of its proper divisors (22674831).

56397489 is a wasteful number, since it uses less digits than its factorization.

56397489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10720.

The product of its digits is 1632960, while the sum is 51.

The square root of 56397489 is about 7509.8261631012. The cubic root of 56397489 is about 383.4893045615.

The spelling of 56397489 in words is "fifty-six million, three hundred ninety-seven thousand, four hundred eighty-nine".