26980389 has 6 divisors (see below), whose sum is σ = 38971686. Its totient is φ = 17986920.

The previous prime is 26980333. The next prime is 26980391. The reversal of 26980389 is 98308962.

26980389 is a `hidden beast` number, since 269 + 8 + 0 + 389 = 666.

It can be written as a sum of positive squares in only one way, i.e., 26440164 + 540225 = 5142^2 + 735^2 .

It is a de Polignac number, because none of the positive numbers 2^k-26980389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26980189) 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, 1498902 + ... + 1498919.

It is an arithmetic number, because the mean of its divisors is an integer number (6495281).

Almost surely, 2^26980389 is an apocalyptic number.

It is an amenable number.

26980389 is a deficient number, since it is larger than the sum of its proper divisors (11991297).

26980389 is a wasteful number, since it uses less digits than its factorization.

26980389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997827 (or 2997824 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 26980389 is about 5194.2650105669. The cubic root of 26980389 is about 299.9273490742.

The spelling of 26980389 in words is "twenty-six million, nine hundred eighty thousand, three hundred eighty-nine".