2947638 has 8 divisors (see below), whose sum is σ = 5895288. Its totient is φ = 982544.

The previous prime is 2947621. The next prime is 2947649. The reversal of 2947638 is 8367492.

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

2947638 is an admirable number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2947596 and 2947605.

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 3 ways as a sum of consecutive naturals, for example, 245631 + ... + 245642.

It is an arithmetic number, because the mean of its divisors is an integer number (736911).

2^2947638 is an apocalyptic number.

2947638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2947638 is a wasteful number, since it uses less digits than its factorization.

2947638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491278.

The product of its digits is 72576, while the sum is 39.

The square root of 2947638 is about 1716.8686612551. The cubic root of 2947638 is about 143.3809264463.

The spelling of 2947638 in words is "two million, nine hundred forty-seven thousand, six hundred thirty-eight".