51478392 has 32 divisors (see below), whose sum is σ = 147081600. Its totient is φ = 14708064.

The previous prime is 51478381. The next prime is 51478409. The reversal of 51478392 is 29387415.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 51478392.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153042 + ... + 153377.

It is an arithmetic number, because the mean of its divisors is an integer number (4596300).

Almost surely, 2^51478392 is an apocalyptic number.

It is an amenable number.

51478392 is an abundant number, since it is smaller than the sum of its proper divisors (95603208).

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

51478392 is a wasteful number, since it uses less digits than its factorization.

51478392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306435 (or 306431 counting only the distinct ones).

The product of its digits is 60480, while the sum is 39.

The square root of 51478392 is about 7174.8443885565. The cubic root of 51478392 is about 371.9989016039.

The spelling of 51478392 in words is "fifty-one million, four hundred seventy-eight thousand, three hundred ninety-two".