26401393 has 4 divisors (see below), whose sum is σ = 27790960. Its totient is φ = 25011828.

The previous prime is 26401381. The next prime is 26401409. The reversal of 26401393 is 39310462.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39310462 = 2 ⋅19655231.

It is not a de Polignac number, because 26401393 - 2¹³ = 26393201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26401303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 694755 + ... + 694792.

It is an arithmetic number, because the mean of its divisors is an integer number (6947740).

Almost surely, 2^26401393 is an apocalyptic number.

It is an amenable number.

26401393 is a deficient number, since it is larger than the sum of its proper divisors (1389567).

26401393 is a wasteful number, since it uses less digits than its factorization.

26401393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389566.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 26401393 is about 5138.2285858066. The cubic root of 26401393 is about 297.7663476354.

The spelling of 26401393 in words is "twenty-six million, four hundred one thousand, three hundred ninety-three".