27729998 has 4 divisors (see below), whose sum is σ = 41595000. Its totient is φ = 13864998.

The previous prime is 27729991. The next prime is 27730039. The reversal of 27729998 is 89992772.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27729991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6932498 + ... + 6932501.

It is an arithmetic number, because the mean of its divisors is an integer number (10398750).

Almost surely, 2^27729998 is an apocalyptic number.

27729998 is a deficient number, since it is larger than the sum of its proper divisors (13865002).

27729998 is a wasteful number, since it uses less digits than its factorization.

27729998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13865001.

The product of its digits is 1143072, while the sum is 53.

The square root of 27729998 is about 5265.9280283726. The cubic root of 27729998 is about 302.6796892476.

The spelling of 27729998 in words is "twenty-seven million, seven hundred twenty-nine thousand, nine hundred ninety-eight".