51378834 has 16 divisors (see below), whose sum is σ = 110662272. Its totient is φ = 15808848.

The previous prime is 51378827. The next prime is 51378853. The reversal of 51378834 is 43887315.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 51378792 and 51378801.

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, 329274 + ... + 329429.

It is an arithmetic number, because the mean of its divisors is an integer number (6916392).

Almost surely, 2^51378834 is an apocalyptic number.

51378834 is an abundant number, since it is smaller than the sum of its proper divisors (59283438).

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

51378834 is a wasteful number, since it uses less digits than its factorization.

51378834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658721.

The product of its digits is 80640, while the sum is 39.

The square root of 51378834 is about 7167.9030406389. The cubic root of 51378834 is about 371.7589344634.

It can be divided in two parts, 51 and 378834, that added together give a triangular number (378885 = T₈₇₀).

The spelling of 51378834 in words is "fifty-one million, three hundred seventy-eight thousand, eight hundred thirty-four".