400697776 has 20 divisors (see below), whose sum is σ = 789080944. Its totient is φ = 197064000.

The previous prime is 400697749. The next prime is 400697777. The reversal of 400697776 is 677796004.

It is not an unprimeable number, because it can be changed into a prime (400697777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204300 + ... + 206251.

Almost surely, 2^400697776 is an apocalyptic number.

It is an amenable number.

400697776 is a deficient number, since it is larger than the sum of its proper divisors (388383168).

400697776 is a wasteful number, since it uses less digits than its factorization.

400697776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410620 (or 410614 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 46.

The square root of 400697776 is about 20017.4367989511. The cubic root of 400697776 is about 737.2344889682.

The spelling of 400697776 in words is "four hundred million, six hundred ninety-seven thousand, seven hundred seventy-six".