27891642 has 16 divisors (see below), whose sum is σ = 55851840. Its totient is φ = 9285792.

The previous prime is 27891629. The next prime is 27891667. The reversal of 27891642 is 24619872.

It is a self number, because there is not a number n which added to its sum of digits gives 27891642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3534 + ... + 8262.

It is an arithmetic number, because the mean of its divisors is an integer number (3490740).

Almost surely, 2^27891642 is an apocalyptic number.

27891642 is an abundant number, since it is smaller than the sum of its proper divisors (27960198).

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

27891642 is a wasteful number, since it uses less digits than its factorization.

27891642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717.

The product of its digits is 48384, while the sum is 39.

The square root of 27891642 is about 5281.2538284010. The cubic root of 27891642 is about 303.2666780509.

The spelling of 27891642 in words is "twenty-seven million, eight hundred ninety-one thousand, six hundred forty-two".