26839980 has 36 divisors (see below), whose sum is σ = 81415152. Its totient is φ = 7157280.

The previous prime is 26839973. The next prime is 26840071. The reversal of 26839980 is 8993862.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74376 + ... + 74735.

It is an arithmetic number, because the mean of its divisors is an integer number (2261532).

Almost surely, 2^26839980 is an apocalyptic number.

26839980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26839980 is an abundant number, since it is smaller than the sum of its proper divisors (54575172).

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

26839980 is a wasteful number, since it uses less digits than its factorization.

26839980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149126 (or 149121 counting only the distinct ones).

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

The square root of 26839980 is about 5180.7316085665. The cubic root of 26839980 is about 299.4061586170.

The spelling of 26839980 in words is "twenty-six million, eight hundred thirty-nine thousand, nine hundred eighty".