27908997 has 8 divisors (see below), whose sum is σ = 37330656. Its totient is φ = 18546672.

The previous prime is 27908977. The next prime is 27909017. The reversal of 27908997 is 79980972.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27908977) and next prime (27909017).

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

It is not a de Polignac number, because 27908997 - 2⁷ = 27908869 is a prime.

It is a super-2 number, since 2×27908997² = 1557824227092018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27908977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13723 + ... + 15624.

It is an arithmetic number, because the mean of its divisors is an integer number (4666332).

Almost surely, 2^27908997 is an apocalyptic number.

It is an amenable number.

27908997 is a deficient number, since it is larger than the sum of its proper divisors (9421659).

27908997 is a wasteful number, since it uses less digits than its factorization.

27908997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29667.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 27908997 is about 5282.8966486200. The cubic root of 27908997 is about 303.3295654914.

The spelling of 27908997 in words is "twenty-seven million, nine hundred eight thousand, nine hundred ninety-seven".