398077688 has 24 divisors (see below), whose sum is σ = 757133040. Its totient is φ = 196215600.

The previous prime is 398077681. The next prime is 398077697. The reversal of 398077688 is 886770893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398077681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35393 + ... + 45263.

It is an arithmetic number, because the mean of its divisors is an integer number (31547210).

Almost surely, 2^398077688 is an apocalyptic number.

It is an amenable number.

398077688 is a deficient number, since it is larger than the sum of its proper divisors (359055352).

398077688 is an equidigital number, since it uses as much as digits as its factorization.

398077688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10019 (or 9944 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 56.

The square root of 398077688 is about 19951.8843220384. The cubic root of 398077688 is about 735.6240942345.

The spelling of 398077688 in words is "three hundred ninety-eight million, seventy-seven thousand, six hundred eighty-eight".