398285656 has 16 divisors (see below), whose sum is σ = 790714440. Its totient is φ = 187428480.

The previous prime is 398285627. The next prime is 398285659. The reversal of 398285656 is 656582893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398285659) 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, 1464150 + ... + 1464421.

Almost surely, 2^398285656 is an apocalyptic number.

It is an amenable number.

398285656 is a deficient number, since it is larger than the sum of its proper divisors (392428784).

398285656 is a wasteful number, since it uses less digits than its factorization.

398285656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2928594 (or 2928590 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The square root of 398285656 is about 19957.0953798392. The cubic root of 398285656 is about 735.7521761327.

The spelling of 398285656 in words is "three hundred ninety-eight million, two hundred eighty-five thousand, six hundred fifty-six".