27280789 has 4 divisors (see below), whose sum is σ = 28716640. Its totient is φ = 25844940.

The previous prime is 27280763. The next prime is 27280819. The reversal of 27280789 is 98708272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27280789 - 2¹⁹ = 26756501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27281789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 717897 + ... + 717934.

It is an arithmetic number, because the mean of its divisors is an integer number (7179160).

Almost surely, 2^27280789 is an apocalyptic number.

It is an amenable number.

27280789 is a deficient number, since it is larger than the sum of its proper divisors (1435851).

27280789 is a wasteful number, since it uses less digits than its factorization.

27280789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435850.

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 27280789 is about 5223.1014732628. The cubic root of 27280789 is about 301.0363748934.

The spelling of 27280789 in words is "twenty-seven million, two hundred eighty thousand, seven hundred eighty-nine".