26939790 has 80 divisors (see below), whose sum is σ = 73529280. Its totient is φ = 7076160.

The previous prime is 26939779. The next prime is 26939819. The reversal of 26939790 is 9793962.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63780 + ... + 64200.

It is an arithmetic number, because the mean of its divisors is an integer number (919116).

Almost surely, 2^26939790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26939790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36764640).

26939790 is an abundant number, since it is smaller than the sum of its proper divisors (46589490).

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

26939790 is a wasteful number, since it uses less digits than its factorization.

26939790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 510 counting only the distinct ones).

The product of its (nonzero) digits is 183708, while the sum is 45.

The square root of 26939790 is about 5190.3554791555. The cubic root of 26939790 is about 299.7768340310.

The spelling of 26939790 in words is "twenty-six million, nine hundred thirty-nine thousand, seven hundred ninety".