27628690 has 8 divisors (see below), whose sum is σ = 49731660. Its totient is φ = 11051472.

The previous prime is 27628649. The next prime is 27628693. The reversal of 27628690 is 9682672.

It can be written as a sum of positive squares in 2 ways, for example, as 25110121 + 2518569 = 5011^2 + 1587^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×27628690² = 1526689022232200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27628693) 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 3 ways as a sum of consecutive naturals, for example, 1381425 + ... + 1381444.

Almost surely, 2^27628690 is an apocalyptic number.

27628690 is a deficient number, since it is larger than the sum of its proper divisors (22102970).

27628690 is a wasteful number, since it uses less digits than its factorization.

27628690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762876.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 27628690 is about 5256.3000294884. The cubic root of 27628690 is about 302.3106389491.

The spelling of 27628690 in words is "twenty-seven million, six hundred twenty-eight thousand, six hundred ninety".