26728357 has 4 divisors (see below), whose sum is σ = 27181440. Its totient is φ = 26275276.

The previous prime is 26728333. The next prime is 26728363. The reversal of 26728357 is 75382762.

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 a cyclic number.

It is not a de Polignac number, because 26728357 - 2¹⁹ = 26204069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26728367) 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, 226453 + ... + 226570.

It is an arithmetic number, because the mean of its divisors is an integer number (6795360).

Almost surely, 2^26728357 is an apocalyptic number.

It is an amenable number.

26728357 is a deficient number, since it is larger than the sum of its proper divisors (453083).

26728357 is an equidigital number, since it uses as much as digits as its factorization.

26728357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453082.

The product of its digits is 141120, while the sum is 40.

The square root of 26728357 is about 5169.9474852265. The cubic root of 26728357 is about 298.9905218041.

It can be divided in two parts, 26728 and 357, that multiplied together give a triangular number (9541896 = T₄₃₆₈).

The spelling of 26728357 in words is "twenty-six million, seven hundred twenty-eight thousand, three hundred fifty-seven".