51893978 has 16 divisors (see below), whose sum is σ = 82590720. Its totient is φ = 24385536.

The previous prime is 51893977. The next prime is 51893983. The reversal of 51893978 is 87939815.

It is not an unprimeable number, because it can be changed into a prime (51893977) 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, 551 + ... + 10202.

It is an arithmetic number, because the mean of its divisors is an integer number (5161920).

Almost surely, 2^51893978 is an apocalyptic number.

51893978 is a deficient number, since it is larger than the sum of its proper divisors (30696742).

51893978 is a wasteful number, since it uses less digits than its factorization.

51893978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10901.

The product of its digits is 544320, while the sum is 50.

The square root of 51893978 is about 7203.7474969630. The cubic root of 51893978 is about 372.9972710977.

The spelling of 51893978 in words is "fifty-one million, eight hundred ninety-three thousand, nine hundred seventy-eight".