27421380 has 108 divisors (see below), whose sum is σ = 96789420. Its totient is φ = 6265728.

The previous prime is 27421379. The next prime is 27421397. The reversal of 27421380 is 8312472.

It can be written as a sum of positive squares in 2 ways, for example, as 7225344 + 20196036 = 2688^2 + 4494^2 .

It is a super-2 number, since 2×27421380² = 1503864162208800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7266 + ... + 10374.

Almost surely, 2^27421380 is an apocalyptic number.

27421380 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 27421380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48394710).

27421380 is an abundant number, since it is smaller than the sum of its proper divisors (69368040).

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

27421380 is a wasteful number, since it uses less digits than its factorization.

27421380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3138 (or 3126 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 27421380 is about 5236.5427526184. The cubic root of 27421380 is about 301.5526174019.

The spelling of 27421380 in words is "twenty-seven million, four hundred twenty-one thousand, three hundred eighty".