51896988 has 144 divisors (see below), whose sum is σ = 163459296. Its totient is φ = 13639680.

The previous prime is 51896987. The next prime is 51897023. The reversal of 51896988 is 88969815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51896981) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87220 + ... + 87812.

It is an arithmetic number, because the mean of its divisors is an integer number (1135134).

Almost surely, 2^51896988 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 51896988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81729648).

51896988 is an abundant number, since it is smaller than the sum of its proper divisors (111562308).

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

51896988 is a wasteful number, since it uses less digits than its factorization.

51896988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644 (or 639 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 51896988 is about 7203.9564129720. The cubic root of 51896988 is about 373.0044825965.

The spelling of 51896988 in words is "fifty-one million, eight hundred ninety-six thousand, nine hundred eighty-eight".