398339834 has 4 divisors (see below), whose sum is σ = 597509754. Its totient is φ = 199169916.

The previous prime is 398339833. The next prime is 398339839. The reversal of 398339834 is 438933893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 395890609 + 2449225 = 19897^2 + 1565^2 .

It is a super-2 number, since 2×398339834² = 317349246702295112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (398339833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99584957 + ... + 99584960.

Almost surely, 2^398339834 is an apocalyptic number.

398339834 is a deficient number, since it is larger than the sum of its proper divisors (199169920).

398339834 is a wasteful number, since it uses less digits than its factorization.

398339834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199169919.

The product of its digits is 1679616, while the sum is 50.

The square root of 398339834 is about 19958.4526955373. The cubic root of 398339834 is about 735.7855355851.

The spelling of 398339834 in words is "three hundred ninety-eight million, three hundred thirty-nine thousand, eight hundred thirty-four".