51398886 has 32 divisors (see below), whose sum is σ = 128164608. Its totient is φ = 13350240.

The previous prime is 51398881. The next prime is 51398909. The reversal of 51398886 is 68889315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51398881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55165 + ... + 56088.

It is an arithmetic number, because the mean of its divisors is an integer number (4005144).

Almost surely, 2^51398886 is an apocalyptic number.

51398886 is an abundant number, since it is smaller than the sum of its proper divisors (76765722).

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

51398886 is a wasteful number, since it uses less digits than its factorization.

51398886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111276.

The product of its digits is 414720, while the sum is 48.

The square root of 51398886 is about 7169.3016396299. The cubic root of 51398886 is about 371.8072912153.

It can be divided in two parts, 513 and 98886, that added together give a palindrome (99399).

The spelling of 51398886 in words is "fifty-one million, three hundred ninety-eight thousand, eight hundred eighty-six".