27990270 has 144 divisors (see below), whose sum is σ = 92512368. Its totient is φ = 5806080.

The previous prime is 27990269. The next prime is 27990271. The reversal of 27990270 is 7209972.

It is an interprime number because it is at equal distance from previous prime (27990269) and next prime (27990271).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27990271) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 48222 + ... + 48798.

It is an arithmetic number, because the mean of its divisors is an integer number (642447).

Almost surely, 2^27990270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27990270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46256184).

27990270 is an abundant number, since it is smaller than the sum of its proper divisors (64522098).

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

27990270 is a wasteful number, since it uses less digits than its factorization.

27990270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 27990270 is about 5290.5831436620. The cubic root of 27990270 is about 303.6237192902.

It can be divided in two parts, 279902 and 70, that added together give a palindrome (279972).

The spelling of 27990270 in words is "twenty-seven million, nine hundred ninety thousand, two hundred seventy".