51389078 has 16 divisors (see below), whose sum is σ = 85258320. Its totient is φ = 23076576.

The previous prime is 51389071. The next prime is 51389089. The reversal of 51389078 is 87098315.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51389071) 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, 25748 + ... + 27671.

It is an arithmetic number, because the mean of its divisors is an integer number (5328645).

Almost surely, 2^51389078 is an apocalyptic number.

51389078 is a deficient number, since it is larger than the sum of its proper divisors (33869242).

51389078 is a wasteful number, since it uses less digits than its factorization.

51389078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53471.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 51389078 is about 7168.6175794221. The cubic root of 51389078 is about 371.7836401327.

The spelling of 51389078 in words is "fifty-one million, three hundred eighty-nine thousand, seventy-eight".