27912730 has 16 divisors (see below), whose sum is σ = 50304744. Its totient is φ = 11151360.

The previous prime is 27912707. The next prime is 27912739. The reversal of 27912730 is 3721972.

It can be written as a sum of positive squares in 4 ways, for example, as 19368801 + 8543929 = 4401^2 + 2923^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27912692 and 27912701.

It is not an unprimeable number, because it can be changed into a prime (27912739) 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 7 ways as a sum of consecutive naturals, for example, 12154 + ... + 14266.

Almost surely, 2^27912730 is an apocalyptic number.

27912730 is the 2642-nd decagonal number.

27912730 is a deficient number, since it is larger than the sum of its proper divisors (22392014).

27912730 is a wasteful number, since it uses less digits than its factorization.

27912730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3441.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 27912730 is about 5283.2499467657. The cubic root of 27912730 is about 303.3430889535.

It can be divided in two parts, 27 and 912730, that multiplied together give a triangular number (24643710 = T₇₀₂₀).

The spelling of 27912730 in words is "twenty-seven million, nine hundred twelve thousand, seven hundred thirty".