505428978 has 32 divisors (see below), whose sum is σ = 1030136832. Its totient is φ = 165286800.

The previous prime is 505428977. The next prime is 505428983. The reversal of 505428978 is 879824505.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505428977) 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, 87075 + ... + 92697.

It is an arithmetic number, because the mean of its divisors is an integer number (32191776).

Almost surely, 2^505428978 is an apocalyptic number.

505428978 is an abundant number, since it is smaller than the sum of its proper divisors (524707854).

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

505428978 is a wasteful number, since it uses less digits than its factorization.

505428978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910.

The product of its (nonzero) digits is 806400, while the sum is 48.

The square root of 505428978 is about 22481.7476633824. The cubic root of 505428978 is about 796.5628463259.

The spelling of 505428978 in words is "five hundred five million, four hundred twenty-eight thousand, nine hundred seventy-eight".