56777889 has 16 divisors (see below), whose sum is σ = 87183360. Its totient is φ = 32195280.

The previous prime is 56777881. The next prime is 56777891. The reversal of 56777889 is 98877765.

It is not a de Polignac number, because 56777889 - 2³ = 56777881 is a prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (56777881) 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, 7569 + ... + 13070.

It is an arithmetic number, because the mean of its divisors is an integer number (5448960).

Almost surely, 2^56777889 is an apocalyptic number.

It is an amenable number.

56777889 is a deficient number, since it is larger than the sum of its proper divisors (30405471).

56777889 is a wasteful number, since it uses less digits than its factorization.

56777889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20780.

The product of its digits is 5927040, while the sum is 57.

The square root of 56777889 is about 7535.1104172401. The cubic root of 56777889 is about 384.3495826408.

The spelling of 56777889 in words is "fifty-six million, seven hundred seventy-seven thousand, eight hundred eighty-nine".