27684990 has 48 divisors (see below), whose sum is σ = 74653488. Its totient is φ = 7382016.

The previous prime is 27684971. The next prime is 27685013. The reversal of 27684990 is 9948672.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3267 + ... + 8126.

It is an arithmetic number, because the mean of its divisors is an integer number (1555281).

Almost surely, 2^27684990 is an apocalyptic number.

27684990 is an abundant number, since it is smaller than the sum of its proper divisors (46968498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27684990 is a wasteful number, since it uses less digits than its factorization.

27684990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11415 (or 11403 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 27684990 is about 5261.6527821589. The cubic root of 27684990 is about 302.5158428057.

The spelling of 27684990 in words is "twenty-seven million, six hundred eighty-four thousand, nine hundred ninety".