51898860 has 96 divisors (see below), whose sum is σ = 173906880. Its totient is φ = 12773376.

The previous prime is 51898811. The next prime is 51898871. The reversal of 51898860 is 6889815.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3324 + ... + 10716.

It is an arithmetic number, because the mean of its divisors is an integer number (1811530).

Almost surely, 2^51898860 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 51898860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86953440).

51898860 is an abundant number, since it is smaller than the sum of its proper divisors (122008020).

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

51898860 is a wasteful number, since it uses less digits than its factorization.

51898860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7424 (or 7416 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 51898860 is about 7204.0863404043. The cubic root of 51898860 is about 373.0089674811.

The spelling of 51898860 in words is "fifty-one million, eight hundred ninety-eight thousand, eight hundred sixty".