27969669 has 72 divisors (see below), whose sum is σ = 52071552. Its totient is φ = 14152320.

The previous prime is 27969629. The next prime is 27969671. The reversal of 27969669 is 96696972.

It is a happy number.

It is not a de Polignac number, because 27969669 - 2⁹ = 27969157 is a prime.

It is a super-2 number, since 2×27969669² = 1564604767939122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27969629) 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 in 71 ways as a sum of consecutive naturals, for example, 393904 + ... + 393974.

It is an arithmetic number, because the mean of its divisors is an integer number (723216).

Almost surely, 2^27969669 is an apocalyptic number.

It is an amenable number.

27969669 is a deficient number, since it is larger than the sum of its proper divisors (24101883).

27969669 is a wasteful number, since it uses less digits than its factorization.

27969669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 131 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 27969669 is about 5288.6358354494. The cubic root of 27969669 is about 303.5492114055.

The spelling of 27969669 in words is "twenty-seven million, nine hundred sixty-nine thousand, six hundred sixty-nine".