680420404 has 6 divisors (see below), whose sum is σ = 1190735714. Its totient is φ = 340210200.

The previous prime is 680420399. The next prime is 680420453. The reversal of 680420404 is 404024086.

It can be written as a sum of positive squares in only one way, i.e., 642622500 + 37797904 = 25350^2 + 6148^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85052547 + ... + 85052554.

Almost surely, 2^680420404 is an apocalyptic number.

It is an amenable number.

680420404 is a deficient number, since it is larger than the sum of its proper divisors (510315310).

680420404 is a wasteful number, since it uses less digits than its factorization.

680420404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170105105 (or 170105103 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 680420404 is about 26084.8692540331. The cubic root of 680420404 is about 879.5471171752.

The spelling of 680420404 in words is "six hundred eighty million, four hundred twenty thousand, four hundred four".