51486764 has 12 divisors (see below), whose sum is σ = 102973584. Its totient is φ = 22065744.

The previous prime is 51486739. The next prime is 51486779. The reversal of 51486764 is 46768415.

51486764 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919379 + ... + 919434.

It is an arithmetic number, because the mean of its divisors is an integer number (8581132).

Almost surely, 2^51486764 is an apocalyptic number.

It is an amenable number.

51486764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51486764 is a wasteful number, since it uses less digits than its factorization.

51486764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838824 (or 1838822 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 51486764 is about 7175.4277921250. The cubic root of 51486764 is about 372.0190667377.

It can be divided in two parts, 514 and 86764, that added together give a palindrome (87278).

The spelling of 51486764 in words is "fifty-one million, four hundred eighty-six thousand, seven hundred sixty-four".