671024978 has 18 divisors (see below), whose sum is σ = 1090693359. Its totient is φ = 309484032.

The previous prime is 671024971. The next prime is 671024987. The reversal of 671024978 is 879420176.

It can be written as a sum of positive squares in 5 ways, for example, as 50367409 + 620657569 = 7097^2 + 24913^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=18317.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671024971) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 475538 + ... + 476946.

Almost surely, 2^671024978 is an apocalyptic number.

671024978 is a deficient number, since it is larger than the sum of its proper divisors (419668381).

671024978 is an equidigital number, since it uses as much as digits as its factorization.

671024978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2846 (or 1424 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 671024978 is about 25904.1498219880. The cubic root of 671024978 is about 875.4799991691.

The spelling of 671024978 in words is "six hundred seventy-one million, twenty-four thousand, nine hundred seventy-eight".