51797880 has 144 divisors (see below), whose sum is σ = 177002280. Its totient is φ = 13623552.

The previous prime is 51797873. The next prime is 51797881. The reversal of 51797880 is 8879715.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51797881) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 709524 + ... + 709596.

Almost surely, 2^51797880 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 51797880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88501140).

51797880 is an abundant number, since it is smaller than the sum of its proper divisors (125204400).

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

51797880 is an equidigital number, since it uses as much as digits as its factorization.

51797880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 51797880 is about 7197.0744056179. The cubic root of 51797880 is about 372.7668882955.

The spelling of 51797880 in words is "fifty-one million, seven hundred ninety-seven thousand, eight hundred eighty".