27153220 has 12 divisors (see below), whose sum is σ = 57021804. Its totient is φ = 10861280.

The previous prime is 27153211. The next prime is 27153257. The reversal of 27153220 is 2235172.

It can be written as a sum of positive squares in 2 ways, for example, as 8282884 + 18870336 = 2878^2 + 4344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27153191 and 27153200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678811 + ... + 678850.

It is an arithmetic number, because the mean of its divisors is an integer number (4751817).

Almost surely, 2^27153220 is an apocalyptic number.

27153220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27153220 is an abundant number, since it is smaller than the sum of its proper divisors (29868584).

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

27153220 is a wasteful number, since it uses less digits than its factorization.

27153220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357670 (or 1357668 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 27153220 is about 5210.8751664188. The cubic root of 27153220 is about 300.5664114022.

Adding to 27153220 its reverse (2235172), we get a palindrome (29388392).

The spelling of 27153220 in words is "twenty-seven million, one hundred fifty-three thousand, two hundred twenty".