51398634 has 16 divisors (see below), whose sum is σ = 117482688. Its totient is φ = 14685312.

The previous prime is 51398609. The next prime is 51398687. The reversal of 51398634 is 43689315.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51398592 and 51398601.

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, 611847 + ... + 611930.

It is an arithmetic number, because the mean of its divisors is an integer number (7342668).

Almost surely, 2^51398634 is an apocalyptic number.

51398634 is an abundant number, since it is smaller than the sum of its proper divisors (66084054).

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

51398634 is a wasteful number, since it uses less digits than its factorization.

51398634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223789.

The product of its digits is 77760, while the sum is 39.

The square root of 51398634 is about 7169.2840646748. The cubic root of 51398634 is about 371.8066835784.

The spelling of 51398634 in words is "fifty-one million, three hundred ninety-eight thousand, six hundred thirty-four".