398916835 has 8 divisors (see below), whose sum is σ = 494142336. Its totient is φ = 308838720.

The previous prime is 398916821. The next prime is 398916893. The reversal of 398916835 is 538619893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 398916835 - 2⁵ = 398916803 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1286674 + ... + 1286983.

It is an arithmetic number, because the mean of its divisors is an integer number (61767792).

Almost surely, 2^398916835 is an apocalyptic number.

398916835 is a deficient number, since it is larger than the sum of its proper divisors (95225501).

398916835 is a wasteful number, since it uses less digits than its factorization.

398916835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2573693.

The product of its digits is 1399680, while the sum is 52.

The square root of 398916835 is about 19972.9025181620. The cubic root of 398916835 is about 736.1406295107.

The spelling of 398916835 in words is "three hundred ninety-eight million, nine hundred sixteen thousand, eight hundred thirty-five".