27090945 has 48 divisors (see below), whose sum is σ = 56833920. Its totient is φ = 11653632.

The previous prime is 27090881. The next prime is 27090991. The reversal of 27090945 is 54909072.

It is not a de Polignac number, because 27090945 - 2⁶ = 27090881 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2826 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (1184040).

It is a Proth number, since it is equal to 3307 ⋅ 2¹³ + 1 and 3307 < 2¹³.

Almost surely, 2^27090945 is an apocalyptic number.

It is an amenable number.

27090945 is an abundant number, since it is smaller than the sum of its proper divisors (29742975).

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

27090945 is a wasteful number, since it uses less digits than its factorization.

27090945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094 (or 5091 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 27090945 is about 5204.8962525683. The cubic root of 27090945 is about 300.3364558505.

Subtracting 27090945 from its reverse (54909072), we obtain a cube (27818127 = 303³).

The spelling of 27090945 in words is "twenty-seven million, ninety thousand, nine hundred forty-five".