2978438 has 16 divisors (see below), whose sum is σ = 4656960. Its totient is φ = 1427496.

The previous prime is 2978429. The next prime is 2978453. The reversal of 2978438 is 8348792.

2978438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2978395 and 2978404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4781 + ... + 5367.

It is an arithmetic number, because the mean of its divisors is an integer number (291060).

2^2978438 is an apocalyptic number.

2978438 is a deficient number, since it is larger than the sum of its proper divisors (1678522).

2978438 is a wasteful number, since it uses less digits than its factorization.

2978438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691.

The product of its digits is 96768, while the sum is 41.

The square root of 2978438 is about 1725.8151697097. The cubic root of 2978438 is about 143.8785949470.

The spelling of 2978438 in words is "two million, nine hundred seventy-eight thousand, four hundred thirty-eight".