27775998 has 12 divisors (see below), whose sum is σ = 60181368. Its totient is φ = 9258660.

The previous prime is 27775991. The next prime is 27775999. The reversal of 27775998 is 89957772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27775991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 771538 + ... + 771573.

It is an arithmetic number, because the mean of its divisors is an integer number (5015114).

Almost surely, 2^27775998 is an apocalyptic number.

27775998 is an abundant number, since it is smaller than the sum of its proper divisors (32405370).

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

27775998 is a wasteful number, since it uses less digits than its factorization.

27775998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543119 (or 1543116 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 27775998 is about 5270.2939196975. The cubic root of 27775998 is about 302.8469638588.

The spelling of 27775998 in words is "twenty-seven million, seven hundred seventy-five thousand, nine hundred ninety-eight".