27720434 has 8 divisors (see below), whose sum is σ = 47520768. Its totient is φ = 11880180.

The previous prime is 27720419. The next prime is 27720467. The reversal of 27720434 is 43402772.

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

It is a super-2 number, since 2×27720434² = 1536844922296712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27720397 and 27720406.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990002 + ... + 990029.

It is an arithmetic number, because the mean of its divisors is an integer number (5940096).

Almost surely, 2^27720434 is an apocalyptic number.

27720434 is a deficient number, since it is larger than the sum of its proper divisors (19800334).

27720434 is a wasteful number, since it uses less digits than its factorization.

27720434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980040.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 27720434 is about 5265.0198480158. The cubic root of 27720434 is about 302.6448874490.

The spelling of 27720434 in words is "twenty-seven million, seven hundred twenty thousand, four hundred thirty-four".