27220400 has 60 divisors (see below), whose sum is σ = 69261192. Its totient is φ = 10245120.

The previous prime is 27220399. The next prime is 27220411. The reversal of 27220400 is 402272.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4799 + ... + 8801.

Almost surely, 2^27220400 is an apocalyptic number.

27220400 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 27220400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34630596).

27220400 is an abundant number, since it is smaller than the sum of its proper divisors (42040792).

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

27220400 is a wasteful number, since it uses less digits than its factorization.

27220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4038 (or 4027 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 27220400 is about 5217.3173183160. The cubic root of 27220400 is about 300.8140851825.

Adding to 27220400 its reverse (402272), we get a palindrome (27622672).

The spelling of 27220400 in words is "twenty-seven million, two hundred twenty thousand, four hundred".