56276389 has 4 divisors (see below), whose sum is σ = 60605356. Its totient is φ = 51947424.

The previous prime is 56276387. The next prime is 56276401. The reversal of 56276389 is 98367265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98367265 = 5 ⋅19673453.

It can be written as a sum of positive squares in 2 ways, for example, as 3960100 + 52316289 = 1990^2 + 7233^2 .

It is a cyclic number.

It is not a de Polignac number, because 56276389 - 2¹ = 56276387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56276387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164464 + ... + 2164489.

It is an arithmetic number, because the mean of its divisors is an integer number (15151339).

Almost surely, 2^56276389 is an apocalyptic number.

It is an amenable number.

56276389 is a deficient number, since it is larger than the sum of its proper divisors (4328967).

56276389 is a wasteful number, since it uses less digits than its factorization.

56276389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328966.

The product of its digits is 544320, while the sum is 46.

The square root of 56276389 is about 7501.7590603804. The cubic root of 56276389 is about 383.2146242801.

It can be divided in two parts, 56276 and 389, that added together give a palindrome (56665).

The spelling of 56276389 in words is "fifty-six million, two hundred seventy-six thousand, three hundred eighty-nine".