27172240 has 20 divisors (see below), whose sum is σ = 63175644. Its totient is φ = 10868864.

The previous prime is 27172237. The next prime is 27172241. The reversal of 27172240 is 4227172.

It can be written as a sum of positive squares in 2 ways, for example, as 18386944 + 8785296 = 4288^2 + 2964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (27172241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169747 + ... + 169906.

Almost surely, 2^27172240 is an apocalyptic number.

27172240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27172240 is an abundant number, since it is smaller than the sum of its proper divisors (36003404).

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

27172240 is a wasteful number, since it uses less digits than its factorization.

27172240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339666 (or 339660 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 27172240 is about 5212.6998762637. The cubic root of 27172240 is about 300.6365742148.

The spelling of 27172240 in words is "twenty-seven million, one hundred seventy-two thousand, two hundred forty".