27958381 has 12 divisors (see below), whose sum is σ = 30895900. Its totient is φ = 25280640.

The previous prime is 27958361. The next prime is 27958417. The reversal of 27958381 is 18385972.

It can be written as a sum of positive squares in 2 ways, for example, as 18404100 + 9554281 = 4290^2 + 3091^2 .

It is not a de Polignac number, because 27958381 - 2¹¹ = 27956333 is a prime.

It is a super-2 number, since 2×27958381² = 1563342136282322, which contains 22 as substring.

It is a Duffinian number.

27958381 is a Rhonda number in base 12.

Its product of digits (120960) is a multiple of the sum of its prime factors (1260).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27958361) 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, 27205 + ... + 28213.

Almost surely, 2^27958381 is an apocalyptic number.

It is an amenable number.

27958381 is a deficient number, since it is larger than the sum of its proper divisors (2937519).

27958381 is a wasteful number, since it uses less digits than its factorization.

27958381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260 (or 1249 counting only the distinct ones).

The product of its digits is 120960, while the sum is 43.

The square root of 27958381 is about 5287.5685338348. The cubic root of 27958381 is about 303.5083704437.

The spelling of 27958381 in words is "twenty-seven million, nine hundred fifty-eight thousand, three hundred eighty-one".