399798898 has 4 divisors (see below), whose sum is σ = 599698350. Its totient is φ = 199899448.

The previous prime is 399798887. The next prime is 399798899. The reversal of 399798898 is 898897993.

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., 365306769 + 34492129 = 19113^2 + 5873^2 .

It is not an unprimeable number, because it can be changed into a prime (399798899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99949723 + ... + 99949726.

Almost surely, 2^399798898 is an apocalyptic number.

399798898 is a deficient number, since it is larger than the sum of its proper divisors (199899452).

399798898 is a wasteful number, since it uses less digits than its factorization.

399798898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199899451.

The product of its digits is 70543872, while the sum is 70.

The square root of 399798898 is about 19994.9718179346. The cubic root of 399798898 is about 736.6828013455.

The spelling of 399798898 in words is "three hundred ninety-nine million, seven hundred ninety-eight thousand, eight hundred ninety-eight".