51898728 has 128 divisors (see below), whose sum is σ = 158976000. Its totient is φ = 13789440.

The previous prime is 51898727. The next prime is 51898729. The reversal of 51898728 is 82789815.

It is an interprime number because it is at equal distance from previous prime (51898727) and next prime (51898729).

It is not an unprimeable number, because it can be changed into a prime (51898727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 226518 + ... + 226746.

It is an arithmetic number, because the mean of its divisors is an integer number (1242000).

Almost surely, 2^51898728 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 51898728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79488000).

51898728 is an abundant number, since it is smaller than the sum of its proper divisors (107077272).

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

51898728 is a wasteful number, since it uses less digits than its factorization.

51898728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335 (or 331 counting only the distinct ones).

The product of its digits is 322560, while the sum is 48.

The square root of 51898728 is about 7204.0771789314. The cubic root of 51898728 is about 373.0086512427.

The spelling of 51898728 in words is "fifty-one million, eight hundred ninety-eight thousand, seven hundred twenty-eight".