27970638 has 8 divisors (see below), whose sum is σ = 55941288. Its totient is φ = 9323544.

The previous prime is 27970633. The next prime is 27970639. The reversal of 27970638 is 83607972.

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

27970638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 27970638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27970633) 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 3 ways as a sum of consecutive naturals, for example, 2330881 + ... + 2330892.

It is an arithmetic number, because the mean of its divisors is an integer number (6992661).

Almost surely, 2^27970638 is an apocalyptic number.

27970638 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.

27970638 is a wasteful number, since it uses less digits than its factorization.

27970638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4661778.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 27970638 is about 5288.7274461821. The cubic root of 27970638 is about 303.5527168193.

The spelling of 27970638 in words is "twenty-seven million, nine hundred seventy thousand, six hundred thirty-eight".