512238978 has 40 divisors (see below), whose sum is σ = 1184832000. Its totient is φ = 165236760.

The previous prime is 512238959. The next prime is 512238997. The reversal of 512238978 is 879832215.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (512238959) and next prime (512238997).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45978 + ... + 56021.

It is an arithmetic number, because the mean of its divisors is an integer number (29620800).

Almost surely, 2^512238978 is an apocalyptic number.

512238978 is an abundant number, since it is smaller than the sum of its proper divisors (672593022).

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

512238978 is a wasteful number, since it uses less digits than its factorization.

512238978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102044 (or 102035 counting only the distinct ones).

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

The square root of 512238978 is about 22632.6970995505. The cubic root of 512238978 is about 800.1244483481.

It can be divided in two parts, 5122 and 38978, that added together give a square (44100 = 210²).

The spelling of 512238978 in words is "five hundred twelve million, two hundred thirty-eight thousand, nine hundred seventy-eight".