51709008 has 80 divisors (see below), whose sum is σ = 144990720. Its totient is φ = 15785472.

The previous prime is 51708971. The next prime is 51709027. The reversal of 51709008 is 80090715.

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, 107713 + ... + 108191.

It is an arithmetic number, because the mean of its divisors is an integer number (1812384).

Almost surely, 2^51709008 is an apocalyptic number.

51709008 is the 4152-nd octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51709008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72495360).

51709008 is an abundant number, since it is smaller than the sum of its proper divisors (93281712).

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

51709008 is a wasteful number, since it uses less digits than its factorization.

51709008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 30.

The square root of 51709008 is about 7190.8975795793. The cubic root of 51709008 is about 372.5535751658.

The spelling of 51709008 in words is "fifty-one million, seven hundred nine thousand, eight".