27752381 has 12 divisors (see below), whose sum is σ = 29785140. Its totient is φ = 25850880.

The previous prime is 27752371. The next prime is 27752393. The reversal of 27752381 is 18325772.

It can be written as a sum of positive squares in 6 ways, for example, as 1322500 + 26429881 = 1150^2 + 5141^2 .

It is not a de Polignac number, because 27752381 - 2¹⁸ = 27490237 is a prime.

It is a super-2 number, since 2×27752381² = 1540389302338322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27752311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31061 + ... + 31941.

It is an arithmetic number, because the mean of its divisors is an integer number (2482095).

Almost surely, 2^27752381 is an apocalyptic number.

It is an amenable number.

27752381 is a deficient number, since it is larger than the sum of its proper divisors (2032759).

27752381 is a wasteful number, since it uses less digits than its factorization.

27752381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024 (or 1007 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 27752381 is about 5268.0528660977. The cubic root of 27752381 is about 302.7611059797.

The spelling of 27752381 in words is "twenty-seven million, seven hundred fifty-two thousand, three hundred eighty-one".