27693428 has 36 divisors (see below), whose sum is σ = 56713860. Its totient is φ = 11797632.

The previous prime is 27693397. The next prime is 27693433. The reversal of 27693428 is 82439672.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12545764 + 15147664 = 3542^2 + 3892^2 .

Its product of digits (145152) is a multiple of the sum of its prime factors (864).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44576 + ... + 45192.

It is an arithmetic number, because the mean of its divisors is an integer number (1575385).

Almost surely, 2^27693428 is an apocalyptic number.

27693428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27693428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28356930).

27693428 is an abundant number, since it is smaller than the sum of its proper divisors (29020432).

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

27693428 is a wasteful number, since it uses less digits than its factorization.

27693428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 855 counting only the distinct ones).

The product of its digits is 145152, while the sum is 41.

The square root of 27693428 is about 5262.4545603739. The cubic root of 27693428 is about 302.5465738913.

The spelling of 27693428 in words is "twenty-seven million, six hundred ninety-three thousand, four hundred twenty-eight".