26988240 has 80 divisors (see below), whose sum is σ = 84369600. Its totient is φ = 7136256.

The previous prime is 26988233. The next prime is 26988251. The reversal of 26988240 is 4288962.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32956 + ... + 33764.

It is an arithmetic number, because the mean of its divisors is an integer number (1054620).

Almost surely, 2^26988240 is an apocalyptic number.

26988240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26988240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42184800).

26988240 is an abundant number, since it is smaller than the sum of its proper divisors (57381360).

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

26988240 is a wasteful number, since it uses less digits than its factorization.

26988240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 26988240 is about 5195.0206929328. The cubic root of 26988240 is about 299.9564381193.

The spelling of 26988240 in words is "twenty-six million, nine hundred eighty-eight thousand, two hundred forty".