27721230 has 16 divisors (see below), whose sum is σ = 66531024. Its totient is φ = 7392320.

The previous prime is 27721229. The next prime is 27721231. The reversal of 27721230 is 3212772.

It is an interprime number because it is at equal distance from previous prime (27721229) and next prime (27721231).

It is a self number, because there is not a number n which added to its sum of digits gives 27721230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27721231) 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, 461991 + ... + 462050.

It is an arithmetic number, because the mean of its divisors is an integer number (4158189).

Almost surely, 2^27721230 is an apocalyptic number.

27721230 is an abundant number, since it is smaller than the sum of its proper divisors (38809794).

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

27721230 is a wasteful number, since it uses less digits than its factorization.

27721230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924051.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 27721230 is about 5265.0954407304. The cubic root of 27721230 is about 302.6477842654.

The spelling of 27721230 in words is "twenty-seven million, seven hundred twenty-one thousand, two hundred thirty".