27979722 has 64 divisors (see below), whose sum is σ = 68169600. Its totient is φ = 8467200.

The previous prime is 27979717. The next prime is 27979729. The reversal of 27979722 is 22797972.

It is not an unprimeable number, because it can be changed into a prime (27979729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26097 + ... + 27147.

It is an arithmetic number, because the mean of its divisors is an integer number (1065150).

Almost surely, 2^27979722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27979722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34084800).

27979722 is an abundant number, since it is smaller than the sum of its proper divisors (40189878).

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

27979722 is a wasteful number, since it uses less digits than its factorization.

27979722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1102 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 27979722 is about 5289.5861841925. The cubic root of 27979722 is about 303.5855747806.

The spelling of 27979722 in words is "twenty-seven million, nine hundred seventy-nine thousand, seven hundred twenty-two".