27428890 has 8 divisors (see below), whose sum is σ = 49372020. Its totient is φ = 10971552.

The previous prime is 27428887. The next prime is 27428899. The reversal of 27428890 is 9882472.

It can be written as a sum of positive squares in 2 ways, for example, as 26286129 + 1142761 = 5127^2 + 1069^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (27428899) 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, 1371435 + ... + 1371454.

Almost surely, 2^27428890 is an apocalyptic number.

27428890 is a deficient number, since it is larger than the sum of its proper divisors (21943130).

27428890 is a wasteful number, since it uses less digits than its factorization.

27428890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742896.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 27428890 is about 5237.2597796940. The cubic root of 27428890 is about 301.5801440185.

The spelling of 27428890 in words is "twenty-seven million, four hundred twenty-eight thousand, eight hundred ninety".