51989496 has 64 divisors (see below), whose sum is σ = 140706720. Its totient is φ = 15912960.

The previous prime is 51989471. The next prime is 51989503. The reversal of 51989496 is 69498915.

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, 87376 + ... + 87968.

Almost surely, 2^51989496 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 51989496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70353360).

51989496 is an abundant number, since it is smaller than the sum of its proper divisors (88717224).

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

51989496 is a wasteful number, since it uses less digits than its factorization.

51989496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896 (or 892 counting only the distinct ones).

The product of its digits is 699840, while the sum is 51.

The square root of 51989496 is about 7210.3741927864. The cubic root of 51989496 is about 373.2259817475.

The spelling of 51989496 in words is "fifty-one million, nine hundred eighty-nine thousand, four hundred ninety-six".