51478908 has 24 divisors (see below), whose sum is σ = 129357648. Its totient is φ = 15839616.

The previous prime is 51478901. The next prime is 51478909. The reversal of 51478908 is 80987415.

It is a self number, because there is not a number n which added to its sum of digits gives 51478908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51478901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164841 + ... + 165152.

It is an arithmetic number, because the mean of its divisors is an integer number (5389902).

Almost surely, 2^51478908 is an apocalyptic number.

It is an amenable number.

51478908 is an abundant number, since it is smaller than the sum of its proper divisors (77878740).

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

51478908 is a wasteful number, since it uses less digits than its factorization.

51478908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330013 (or 330011 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 51478908 is about 7174.8803474344. The cubic root of 51478908 is about 372.0001445253. Note that the first 3 decimals are identical.

The spelling of 51478908 in words is "fifty-one million, four hundred seventy-eight thousand, nine hundred eight".