500943978 has 12 divisors (see below), whose sum is σ = 1085378658. Its totient is φ = 166981320.

The previous prime is 500943943. The next prime is 500943983. The reversal of 500943978 is 879349005.

It can be written as a sum of positive squares in only one way, i.e., 287404209 + 213539769 = 16953^2 + 14613^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13915093 + ... + 13915128.

Almost surely, 2^500943978 is an apocalyptic number.

500943978 is an abundant number, since it is smaller than the sum of its proper divisors (584434680).

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

500943978 is a wasteful number, since it uses less digits than its factorization.

500943978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27830229 (or 27830226 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 500943978 is about 22381.7778114251. Note that the first 3 decimals coincide. The cubic root of 500943978 is about 794.1997025314.

The spelling of 500943978 in words is "five hundred million, nine hundred forty-three thousand, nine hundred seventy-eight".