56278389 has 8 divisors (see below), whose sum is σ = 76309920. Its totient is φ = 36882896.

The previous prime is 56278379. The next prime is 56278393. The reversal of 56278389 is 98387265.

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 56278389 - 2¹³ = 56270197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56278379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158802 + ... + 159155.

It is an arithmetic number, because the mean of its divisors is an integer number (9538740).

Almost surely, 2^56278389 is an apocalyptic number.

56278389 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

56278389 is a deficient number, since it is larger than the sum of its proper divisors (20031531).

56278389 is a wasteful number, since it uses less digits than its factorization.

56278389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318019.

The product of its digits is 725760, while the sum is 48.

The square root of 56278389 is about 7501.8923612646. The cubic root of 56278389 is about 383.2191638995.

The spelling of 56278389 in words is "fifty-six million, two hundred seventy-eight thousand, three hundred eighty-nine".