342978638 has 16 divisors (see below), whose sum is σ = 545408640. Its totient is φ = 161200896.

The previous prime is 342978619. The next prime is 342978667. The reversal of 342978638 is 836879243.

342978638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×342978638² = 235268692248670088, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 23498 + ... + 35186.

It is an arithmetic number, because the mean of its divisors is an integer number (34088040).

Almost surely, 2^342978638 is an apocalyptic number.

342978638 is a deficient number, since it is larger than the sum of its proper divisors (202430002).

342978638 is a wasteful number, since it uses less digits than its factorization.

342978638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12571.

The product of its digits is 1741824, while the sum is 50.

The square root of 342978638 is about 18519.6824486815. The cubic root of 342978638 is about 699.9854677255.

The spelling of 342978638 in words is "three hundred forty-two million, nine hundred seventy-eight thousand, six hundred thirty-eight".