56398945 has 8 divisors (see below), whose sum is σ = 71659944. Its totient is φ = 42465024.

The previous prime is 56398913. The next prime is 56398949. The reversal of 56398945 is 54989365.

It can be written as a sum of positive squares in 4 ways, for example, as 3415104 + 52983841 = 1848^2 + 7279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56398945 - 2⁵ = 56398913 is a prime.

It is a super-2 number, since 2×56398945² = 6361681994226050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56398949) 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, 331674 + ... + 331843.

It is an arithmetic number, because the mean of its divisors is an integer number (8957493).

Almost surely, 2^56398945 is an apocalyptic number.

It is an amenable number.

56398945 is a deficient number, since it is larger than the sum of its proper divisors (15260999).

56398945 is a wasteful number, since it uses less digits than its factorization.

56398945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663539.

The product of its digits is 1166400, while the sum is 49.

The square root of 56398945 is about 7509.9231021363. The cubic root of 56398945 is about 383.4926046826.

The spelling of 56398945 in words is "fifty-six million, three hundred ninety-eight thousand, nine hundred forty-five".