26728438 has 32 divisors (see below), whose sum is σ = 46179072. Its totient is φ = 11484000.

The previous prime is 26728423. The next prime is 26728441. The reversal of 26728438 is 83482762.

It is a self number, because there is not a number n which added to its sum of digits gives 26728438.

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, 50845 + ... + 51367.

It is an arithmetic number, because the mean of its divisors is an integer number (1443096).

Almost surely, 2^26728438 is an apocalyptic number.

26728438 is a deficient number, since it is larger than the sum of its proper divisors (19450634).

26728438 is a wasteful number, since it uses less digits than its factorization.

26728438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660.

The product of its digits is 129024, while the sum is 40.

The square root of 26728438 is about 5169.9553189559. The cubic root of 26728438 is about 298.9908238330.

The spelling of 26728438 in words is "twenty-six million, seven hundred twenty-eight thousand, four hundred thirty-eight".