27981733 has 8 divisors (see below), whose sum is σ = 30225888. Its totient is φ = 25750704.

The previous prime is 27981727. The next prime is 27981763. The reversal of 27981733 is 33718972.

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

It is a cyclic number.

It is not a de Polignac number, because 27981733 - 2⁹ = 27981221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27981763) 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, 1410 + ... + 7612.

It is an arithmetic number, because the mean of its divisors is an integer number (3778236).

Almost surely, 2^27981733 is an apocalyptic number.

It is an amenable number.

27981733 is a deficient number, since it is larger than the sum of its proper divisors (2244155).

27981733 is a wasteful number, since it uses less digits than its factorization.

27981733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6563.

The product of its digits is 63504, while the sum is 40.

The square root of 27981733 is about 5289.7762712614. The cubic root of 27981733 is about 303.5928478569.

The spelling of 27981733 in words is "twenty-seven million, nine hundred eighty-one thousand, seven hundred thirty-three".