51677808 has 80 divisors (see below), whose sum is σ = 164322816. Its totient is φ = 13628160.

The previous prime is 51677783. The next prime is 51677827. The reversal of 51677808 is 80877615.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 51677808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1548 + ... + 10283.

Almost surely, 2^51677808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51677808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82161408).

51677808 is an abundant number, since it is smaller than the sum of its proper divisors (112645008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51677808 is a wasteful number, since it uses less digits than its factorization.

51677808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11862 (or 11856 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 51677808 is about 7188.7278429497. The cubic root of 51677808 is about 372.4786300669.

The spelling of 51677808 in words is "fifty-one million, six hundred seventy-seven thousand, eight hundred eight".