27749890 has 16 divisors (see below), whose sum is σ = 57085632. Its totient is φ = 9514224.

The previous prime is 27749879. The next prime is 27749893. The reversal of 27749890 is 9894772.

It is a self number, because there is not a number n which added to its sum of digits gives 27749890.

It is not an unprimeable number, because it can be changed into a prime (27749893) 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, 198144 + ... + 198283.

It is an arithmetic number, because the mean of its divisors is an integer number (3567852).

Almost surely, 2^27749890 is an apocalyptic number.

27749890 is an abundant number, since it is smaller than the sum of its proper divisors (29335742).

27749890 is a wasteful number, since it uses less digits than its factorization.

27749890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396441.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 27749890 is about 5267.8164356781. The cubic root of 27749890 is about 302.7520472918.

The spelling of 27749890 in words is "twenty-seven million, seven hundred forty-nine thousand, eight hundred ninety".