774393985 has 16 divisors (see below), whose sum is σ = 936254592. Its totient is φ = 614880000.

The previous prime is 774393953. The next prime is 774394003. The reversal of 774393985 is 589393477.

It is a happy number.

It is not a de Polignac number, because 774393985 - 2⁵ = 774393953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 422020 + ... + 423850.

It is an arithmetic number, because the mean of its divisors is an integer number (58515912).

Almost surely, 2^774393985 is an apocalyptic number.

It is an amenable number.

774393985 is a deficient number, since it is larger than the sum of its proper divisors (161860607).

774393985 is a wasteful number, since it uses less digits than its factorization.

774393985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424.

The product of its digits is 5715360, while the sum is 55.

The square root of 774393985 is about 27827.9353348393. The cubic root of 774393985 is about 918.3057922672.

The spelling of 774393985 in words is "seven hundred seventy-four million, three hundred ninety-three thousand, nine hundred eighty-five".