27742258 has 4 divisors (see below), whose sum is σ = 41613390. Its totient is φ = 13871128.

The previous prime is 27742237. The next prime is 27742259. The reversal of 27742258 is 85224772.

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., 21224449 + 6517809 = 4607^2 + 2553^2 .

It is not an unprimeable number, because it can be changed into a prime (27742259) by changing a digit.

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, 6935563 + ... + 6935566.

Almost surely, 2^27742258 is an apocalyptic number.

27742258 is a deficient number, since it is larger than the sum of its proper divisors (13871132).

27742258 is a wasteful number, since it uses less digits than its factorization.

27742258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13871131.

The product of its digits is 62720, while the sum is 37.

The square root of 27742258 is about 5267.0919870456. The cubic root of 27742258 is about 302.7242896384.

It can be divided in two parts, 27742 and 258, that multiplied together give a triangular number (7157436 = T₃₇₈₃).

The spelling of 27742258 in words is "twenty-seven million, seven hundred forty-two thousand, two hundred fifty-eight".