27921154 has 4 divisors (see below), whose sum is σ = 41881734. Its totient is φ = 13960576.

The previous prime is 27921151. The next prime is 27921167. The reversal of 27921154 is 45112972.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 24770529 + 3150625 = 4977^2 + 1775^2 .

It is not an unprimeable number, because it can be changed into a prime (27921151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6980287 + ... + 6980290.

Almost surely, 2^27921154 is an apocalyptic number.

27921154 is a deficient number, since it is larger than the sum of its proper divisors (13960580).

27921154 is a wasteful number, since it uses less digits than its factorization.

27921154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13960579.

The product of its digits is 5040, while the sum is 31.

The square root of 27921154 is about 5284.0471231812. The cubic root of 27921154 is about 303.3736019746.

The spelling of 27921154 in words is "twenty-seven million, nine hundred twenty-one thousand, one hundred fifty-four".