27428784 has 20 divisors (see below), whose sum is σ = 70857816. Its totient is φ = 9142912.

The previous prime is 27428783. The next prime is 27428813. The reversal of 27428784 is 48782472.

It is not an unprimeable number, because it can be changed into a prime (27428783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285669 + ... + 285764.

Almost surely, 2^27428784 is an apocalyptic number.

27428784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

27428784 is an abundant number, since it is smaller than the sum of its proper divisors (43429032).

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

27428784 is a wasteful number, since it uses less digits than its factorization.

27428784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571444 (or 571438 counting only the distinct ones).

The product of its digits is 200704, while the sum is 42.

The square root of 27428784 is about 5237.2496598883. The cubic root of 27428784 is about 301.5797555287.

The spelling of 27428784 in words is "twenty-seven million, four hundred twenty-eight thousand, seven hundred eighty-four".