678460690 has 32 divisors (see below), whose sum is σ = 1248192000. Its totient is φ = 265457088.

The previous prime is 678460687. The next prime is 678460753. The reversal of 678460690 is 96064876.

It is a super-2 number, since 2×678460690² = 920617815750552200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678460690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82171 + ... + 90049.

It is an arithmetic number, because the mean of its divisors is an integer number (39006000).

Almost surely, 2^678460690 is an apocalyptic number.

678460690 is a deficient number, since it is larger than the sum of its proper divisors (569731310).

678460690 is a wasteful number, since it uses less digits than its factorization.

678460690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8074.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 678460690 is about 26047.2779767867. The cubic root of 678460690 is about 878.7018954840.

The spelling of 678460690 in words is "six hundred seventy-eight million, four hundred sixty thousand, six hundred ninety".