26402889 has 4 divisors (see below), whose sum is σ = 35203856. Its totient is φ = 17601924.

The previous prime is 26402869. The next prime is 26402899. The reversal of 26402889 is 98820462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26402889 - 2²³ = 18014281 is a prime.

It is a super-2 number, since 2×26402889² = 1394225095092642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26402839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4400479 + ... + 4400484.

It is an arithmetic number, because the mean of its divisors is an integer number (8800964).

Almost surely, 2^26402889 is an apocalyptic number.

It is an amenable number.

26402889 is a deficient number, since it is larger than the sum of its proper divisors (8800967).

26402889 is an equidigital number, since it uses as much as digits as its factorization.

26402889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8800966.

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

The square root of 26402889 is about 5138.3741592064. The cubic root of 26402889 is about 297.7719717078.

The spelling of 26402889 in words is "twenty-six million, four hundred two thousand, eight hundred eighty-nine".