51478428 has 12 divisors (see below), whose sum is σ = 120116360. Its totient is φ = 17159472.

The previous prime is 51478421. The next prime is 51478459. The reversal of 51478428 is 82487415.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51478421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2144923 + ... + 2144946.

Almost surely, 2^51478428 is an apocalyptic number.

It is an amenable number.

51478428 is an abundant number, since it is smaller than the sum of its proper divisors (68637932).

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

51478428 is a wasteful number, since it uses less digits than its factorization.

51478428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289876 (or 4289874 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 51478428 is about 7174.8468973212. The cubic root of 51478428 is about 371.9989883196.

The spelling of 51478428 in words is "fifty-one million, four hundred seventy-eight thousand, four hundred twenty-eight".