2398978 has 8 divisors (see below), whose sum is σ = 3787920. Its totient is φ = 1136340.

The previous prime is 2398961. The next prime is 2398987. The reversal of 2398978 is 8798932.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31528 + ... + 31603.

It is an arithmetic number, because the mean of its divisors is an integer number (473490).

2^2398978 is an apocalyptic number.

2398978 is a deficient number, since it is larger than the sum of its proper divisors (1388942).

2398978 is a wasteful number, since it uses less digits than its factorization.

2398978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63152.

The product of its digits is 217728, while the sum is 46.

The square root of 2398978 is about 1548.8634542787. The cubic root of 2398978 is about 133.8675828606.

Subtracting from 2398978 its sum of digits (46), we obtain a palindrome (2398932).

The spelling of 2398978 in words is "two million, three hundred ninety-eight thousand, nine hundred seventy-eight".