26489988 has 54 divisors (see below), whose sum is σ = 77898366. Its totient is φ = 7568064.

The previous prime is 26489959. The next prime is 26489989. The reversal of 26489988 is 88998462.

26489988 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in only one way, i.e., 20958084 + 5531904 = 4578^2 + 2352^2 .

It is not an unprimeable number, because it can be changed into a prime (26489989) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5745 + ... + 9272.

Almost surely, 2^26489988 is an apocalyptic number.

26489988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26489988 is an abundant number, since it is smaller than the sum of its proper divisors (51408378).

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

26489988 is a wasteful number, since it uses less digits than its factorization.

26489988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15041 (or 15029 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 26489988 is about 5146.8425272200. The cubic root of 26489988 is about 298.0990466971.

The spelling of 26489988 in words is "twenty-six million, four hundred eighty-nine thousand, nine hundred eighty-eight".