27426381 has 8 divisors (see below), whose sum is σ = 36601824. Its totient is φ = 18267600.

The previous prime is 27426353. The next prime is 27426397. The reversal of 27426381 is 18362472.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27426381 - 2⁵ = 27426349 is a prime.

It is a super-2 number, since 2×27426381² = 1504412749514322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27426331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390 + ... + 7416.

It is an arithmetic number, because the mean of its divisors is an integer number (4575228).

Almost surely, 2^27426381 is an apocalyptic number.

It is an amenable number.

27426381 is a deficient number, since it is larger than the sum of its proper divisors (9175443).

27426381 is a wasteful number, since it uses less digits than its factorization.

27426381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8331.

The product of its digits is 16128, while the sum is 33.

The square root of 27426381 is about 5237.0202405566. The cubic root of 27426381 is about 301.5709482684.

It can be divided in two parts, 27426 and 381, that multiplied together give a triangular number (10449306 = T₄₅₇₁).

The spelling of 27426381 in words is "twenty-seven million, four hundred twenty-six thousand, three hundred eighty-one".