398823868 has 6 divisors (see below), whose sum is σ = 697941776. Its totient is φ = 199411932.

The previous prime is 398823857. The next prime is 398823869. The reversal of 398823868 is 868328893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398823869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49852980 + ... + 49852987.

Almost surely, 2^398823868 is an apocalyptic number.

It is an amenable number.

398823868 is a deficient number, since it is larger than the sum of its proper divisors (299117908).

398823868 is a wasteful number, since it uses less digits than its factorization.

398823868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99705971 (or 99705969 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 55.

The square root of 398823868 is about 19970.5750543143. The cubic root of 398823868 is about 736.0834395596.

The spelling of 398823868 in words is "three hundred ninety-eight million, eight hundred twenty-three thousand, eight hundred sixty-eight".