26399328 has 24 divisors (see below), whose sum is σ = 69298488. Its totient is φ = 8799744.

The previous prime is 26399327. The next prime is 26399339. The reversal of 26399328 is 82399362.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 26399328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26399323) 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, 137401 + ... + 137592.

It is an arithmetic number, because the mean of its divisors is an integer number (2887437).

Almost surely, 2^26399328 is an apocalyptic number.

It is an amenable number.

26399328 is an abundant number, since it is smaller than the sum of its proper divisors (42899160).

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

26399328 is a wasteful number, since it uses less digits than its factorization.

26399328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275006 (or 274998 counting only the distinct ones).

The product of its digits is 139968, while the sum is 42.

The square root of 26399328 is about 5138.0276371386. The cubic root of 26399328 is about 297.7585841114.

The spelling of 26399328 in words is "twenty-six million, three hundred ninety-nine thousand, three hundred twenty-eight".