26889428 has 12 divisors (see below), whose sum is σ = 47488980. Its totient is φ = 13321152.

The previous prime is 26889419. The next prime is 26889437. The reversal of 26889428 is 82498862.

It is an interprime number because it is at equal distance from previous prime (26889419) and next prime (26889437).

It can be written as a sum of positive squares in 2 ways, for example, as 23833924 + 3055504 = 4882^2 + 1748^2 .

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30401 + ... + 31272.

It is an arithmetic number, because the mean of its divisors is an integer number (3957415).

Almost surely, 2^26889428 is an apocalyptic number.

It is an amenable number.

26889428 is a deficient number, since it is larger than the sum of its proper divisors (20599552).

26889428 is a wasteful number, since it uses less digits than its factorization.

26889428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61786 (or 61784 counting only the distinct ones).

The product of its digits is 442368, while the sum is 47.

The square root of 26889428 is about 5185.5017115029. The cubic root of 26889428 is about 299.5899137604.

The spelling of 26889428 in words is "twenty-six million, eight hundred eighty-nine thousand, four hundred twenty-eight".