2978398 has 4 divisors (see below), whose sum is σ = 4467600. Its totient is φ = 1489198.

The previous prime is 2978377. The next prime is 2978399. The reversal of 2978398 is 8938792.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2978399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744598 + ... + 744601.

It is an arithmetic number, because the mean of its divisors is an integer number (1116900).

2^2978398 is an apocalyptic number.

2978398 is a deficient number, since it is larger than the sum of its proper divisors (1489202).

2978398 is a wasteful number, since it uses less digits than its factorization.

2978398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489201.

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

The square root of 2978398 is about 1725.8035809443. The cubic root of 2978398 is about 143.8779508544.

The spelling of 2978398 in words is "two million, nine hundred seventy-eight thousand, three hundred ninety-eight".