485687978 has 16 divisors (see below), whose sum is σ = 745220904. Its totient is φ = 237332160.

The previous prime is 485687959. The next prime is 485687981. The reversal of 485687978 is 879786584.

It can be written as a sum of positive squares in 4 ways, for example, as 191462569 + 294225409 = 13837^2 + 17153^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 485687978.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6476 + ... + 31832.

Almost surely, 2^485687978 is an apocalyptic number.

485687978 is a deficient number, since it is larger than the sum of its proper divisors (259532926).

485687978 is a wasteful number, since it uses less digits than its factorization.

485687978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25577.

The product of its digits is 27095040, while the sum is 62.

The square root of 485687978 is about 22038.3297461491. The cubic root of 485687978 is about 786.0541252517.

The spelling of 485687978 in words is "four hundred eighty-five million, six hundred eighty-seven thousand, nine hundred seventy-eight".