2399998 has 4 divisors (see below), whose sum is σ = 3600000. Its totient is φ = 1199998.

The previous prime is 2399993. The next prime is 2400001. The reversal of 2399998 is 8999932.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2399993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599998 + ... + 600001.

It is an arithmetic number, because the mean of its divisors is an integer number (900000).

2^2399998 is an apocalyptic number.

2399998 is a deficient number, since it is larger than the sum of its proper divisors (1200002).

2399998 is a wasteful number, since it uses less digits than its factorization.

2399998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200001.

The product of its digits is 314928, while the sum is 49.

The square root of 2399998 is about 1549.1926929856. The cubic root of 2399998 is about 133.8865528257.

The spelling of 2399998 in words is "two million, three hundred ninety-nine thousand, nine hundred ninety-eight".