51785394 has 8 divisors (see below), whose sum is σ = 103570800. Its totient is φ = 17261796.

The previous prime is 51785389. The next prime is 51785411. The reversal of 51785394 is 49358715.

51785394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

51785394 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4315444 + ... + 4315455.

It is an arithmetic number, because the mean of its divisors is an integer number (12946350).

Almost surely, 2^51785394 is an apocalyptic number.

51785394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51785394 is a wasteful number, since it uses less digits than its factorization.

51785394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8630904.

The product of its digits is 151200, while the sum is 42.

The square root of 51785394 is about 7196.2069175365. The cubic root of 51785394 is about 372.7369337788.

The spelling of 51785394 in words is "fifty-one million, seven hundred eighty-five thousand, three hundred ninety-four".