51189380 has 48 divisors (see below), whose sum is σ = 124177536. Its totient is φ = 17518080.

The previous prime is 51189377. The next prime is 51189409. The reversal of 51189380 is 8398115.

It is a self number, because there is not a number n which added to its sum of digits gives 51189380.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3104 + ... + 10583.

It is an arithmetic number, because the mean of its divisors is an integer number (2587032).

Almost surely, 2^51189380 is an apocalyptic number.

It is an amenable number.

51189380 is an abundant number, since it is smaller than the sum of its proper divisors (72988156).

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

51189380 is a wasteful number, since it uses less digits than its factorization.

51189380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13724 (or 13722 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 35.

The square root of 51189380 is about 7154.6753944536. The cubic root of 51189380 is about 371.3014311255.

The spelling of 51189380 in words is "fifty-one million, one hundred eighty-nine thousand, three hundred eighty".