27690320 has 80 divisors (see below), whose sum is σ = 74245248. Its totient is φ = 9408000.

The previous prime is 27690317. The next prime is 27690337. The reversal of 27690320 is 2309672.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110195 + ... + 110445.

Almost surely, 2^27690320 is an apocalyptic number.

27690320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27690320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37122624).

27690320 is an abundant number, since it is smaller than the sum of its proper divisors (46554928).

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

27690320 is a wasteful number, since it uses less digits than its factorization.

27690320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 27690320 is about 5262.1592526262. The cubic root of 27690320 is about 302.5352553222.

Adding to 27690320 its reverse (2309672), we get a palindrome (29999992).

The spelling of 27690320 in words is "twenty-seven million, six hundred ninety thousand, three hundred twenty".