27661154 has 4 divisors (see below), whose sum is σ = 41491734. Its totient is φ = 13830576.

The previous prime is 27661141. The next prime is 27661171. The reversal of 27661154 is 45116672.

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., 19669225 + 7991929 = 4435^2 + 2827^2 .

It is a super-2 number, since 2×27661154² = 1530278881223432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27661154.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6915287 + ... + 6915290.

Almost surely, 2^27661154 is an apocalyptic number.

27661154 is a deficient number, since it is larger than the sum of its proper divisors (13830580).

27661154 is a wasteful number, since it uses less digits than its factorization.

27661154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13830579.

The product of its digits is 10080, while the sum is 32.

The square root of 27661154 is about 5259.3872266643. The cubic root of 27661154 is about 302.4289986585.

The spelling of 27661154 in words is "twenty-seven million, six hundred sixty-one thousand, one hundred fifty-four".