398653828 has 6 divisors (see below), whose sum is σ = 697644206. Its totient is φ = 199326912.

The previous prime is 398653823. The next prime is 398653841. The reversal of 398653828 is 828356893.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 365268544 + 33385284 = 19112^2 + 5778^2 .

It is not an unprimeable number, because it can be changed into a prime (398653823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49831725 + ... + 49831732.

Almost surely, 2^398653828 is an apocalyptic number.

It is an amenable number.

398653828 is a deficient number, since it is larger than the sum of its proper divisors (298990378).

398653828 is a wasteful number, since it uses less digits than its factorization.

398653828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99663461 (or 99663459 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 52.

The square root of 398653828 is about 19966.3173369553. The cubic root of 398653828 is about 735.9788140759.

The spelling of 398653828 in words is "three hundred ninety-eight million, six hundred fifty-three thousand, eight hundred twenty-eight".