27553420 has 48 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 10100160.

The previous prime is 27553417. The next prime is 27553429. The reversal of 27553420 is 2435572.

It is not an unprimeable number, because it can be changed into a prime (27553429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10611 + ... + 12949.

It is an arithmetic number, because the mean of its divisors is an integer number (1310400).

Almost surely, 2^27553420 is an apocalyptic number.

27553420 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 27553420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31449600).

27553420 is an abundant number, since it is smaller than the sum of its proper divisors (35345780).

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

27553420 is a wasteful number, since it uses less digits than its factorization.

27553420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 27553420 is about 5249.1351668632. The cubic root of 27553420 is about 302.0358567428.

Adding to 27553420 its reverse (2435572), we get a palindrome (29988992).

The spelling of 27553420 in words is "twenty-seven million, five hundred fifty-three thousand, four hundred twenty".