27980838 has 24 divisors (see below), whose sum is σ = 61229376. Its totient is φ = 9234000.

The previous prime is 27980837. The next prime is 27980987. The reversal of 27980838 is 83808972.

It is a junction number, because it is equal to n+sod(n) for n = 27980793 and 27980802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27980837) 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 in 11 ways as a sum of consecutive naturals, for example, 5878 + ... + 9513.

It is an arithmetic number, because the mean of its divisors is an integer number (2551224).

Almost surely, 2^27980838 is an apocalyptic number.

27980838 is an abundant number, since it is smaller than the sum of its proper divisors (33248538).

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

27980838 is a wasteful number, since it uses less digits than its factorization.

27980838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15500 (or 15497 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 27980838 is about 5289.6916734343. The cubic root of 27980838 is about 303.5896110012.

The spelling of 27980838 in words is "twenty-seven million, nine hundred eighty thousand, eight hundred thirty-eight".