27390438 has 36 divisors (see below), whose sum is σ = 62690940. Its totient is φ = 8619048.

The previous prime is 27390437. The next prime is 27390443. The reversal of 27390438 is 83409372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27390431) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 96645 + ... + 96927.

It is an arithmetic number, because the mean of its divisors is an integer number (1741415).

Almost surely, 2^27390438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27390438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31345470).

27390438 is an abundant number, since it is smaller than the sum of its proper divisors (35300502).

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

27390438 is a wasteful number, since it uses less digits than its factorization.

27390438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 27390438 is about 5233.5874885207. The cubic root of 27390438 is about 301.4391517676.

The spelling of 27390438 in words is "twenty-seven million, three hundred ninety thousand, four hundred thirty-eight".