51464928 has 48 divisors (see below), whose sum is σ = 138756240. Its totient is φ = 16690176.

The previous prime is 51464923. The next prime is 51464951. The reversal of 51464928 is 82946415.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51464921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3693 + ... + 10796.

It is an arithmetic number, because the mean of its divisors is an integer number (2890755).

Almost surely, 2^51464928 is an apocalyptic number.

It is an amenable number.

51464928 is an abundant number, since it is smaller than the sum of its proper divisors (87291312).

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

51464928 is a wasteful number, since it uses less digits than its factorization.

51464928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14539 (or 14531 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 51464928 is about 7173.9060490084. The cubic root of 51464928 is about 371.9664670895.

The spelling of 51464928 in words is "fifty-one million, four hundred sixty-four thousand, nine hundred twenty-eight".