27223890 has 64 divisors (see below), whose sum is σ = 68539392. Its totient is φ = 6912000.

The previous prime is 27223841. The next prime is 27223901. The reversal of 27223890 is 9832272.

It is a super-2 number, since 2×27223890² = 1482280373464200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67690 + ... + 68090.

It is an arithmetic number, because the mean of its divisors is an integer number (1070928).

Almost surely, 2^27223890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27223890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34269696).

27223890 is an abundant number, since it is smaller than the sum of its proper divisors (41315502).

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

27223890 is a wasteful number, since it uses less digits than its factorization.

27223890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 27223890 is about 5217.6517706723. The cubic root of 27223890 is about 300.8269406915.

The spelling of 27223890 in words is "twenty-seven million, two hundred twenty-three thousand, eight hundred ninety".