26990986 has 12 divisors (see below), whose sum is σ = 44502066. Its totient is φ = 12268520.

The previous prime is 26990959. The next prime is 26990989. The reversal of 26990986 is 68909962.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26842761 + 148225 = 5181^2 + 385^2 .

It is not an unprimeable number, because it can be changed into a prime (26990989) 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, 55525 + ... + 56008.

Almost surely, 2^26990986 is an apocalyptic number.

26990986 is a deficient number, since it is larger than the sum of its proper divisors (17511080).

26990986 is a wasteful number, since it uses less digits than its factorization.

26990986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111557 (or 111546 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 26990986 is about 5195.2849777466. The cubic root of 26990986 is about 299.9666110989.

The spelling of 26990986 in words is "twenty-six million, nine hundred ninety thousand, nine hundred eighty-six".