51998760 has 160 divisors (see below), whose sum is σ = 190792800. Its totient is φ = 12597120.

The previous prime is 51998689. The next prime is 51998789. The reversal of 51998760 is 6789915.

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 39 ways as a sum of consecutive naturals, for example, 34911 + ... + 36369.

It is an arithmetic number, because the mean of its divisors is an integer number (1192455).

Almost surely, 2^51998760 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 51998760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95396400).

51998760 is an abundant number, since it is smaller than the sum of its proper divisors (138794040).

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

51998760 is a wasteful number, since it uses less digits than its factorization.

51998760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493 (or 1480 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 51998760 is about 7211.0165718850. The cubic root of 51998760 is about 373.2481487903.

The spelling of 51998760 in words is "fifty-one million, nine hundred ninety-eight thousand, seven hundred sixty".