51894378 has 32 divisors (see below), whose sum is σ = 118008000. Its totient is φ = 16895088.

The previous prime is 51894373. The next prime is 51894379. The reversal of 51894378 is 87349815.

It is not an unprimeable number, because it can be changed into a prime (51894373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8853 + ... + 13496.

It is an arithmetic number, because the mean of its divisors is an integer number (3687750).

Almost surely, 2^51894378 is an apocalyptic number.

51894378 is an abundant number, since it is smaller than the sum of its proper divisors (66113622).

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

51894378 is a wasteful number, since it uses less digits than its factorization.

51894378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22403 (or 22397 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 51894378 is about 7203.7752602368. The cubic root of 51894378 is about 372.9982294525.

The spelling of 51894378 in words is "fifty-one million, eight hundred ninety-four thousand, three hundred seventy-eight".