26401406 has 4 divisors (see below), whose sum is σ = 39602112. Its totient is φ = 13200702.

The previous prime is 26401381. The next prime is 26401409. The reversal of 26401406 is 60410462.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26401409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6600350 + ... + 6600353.

It is an arithmetic number, because the mean of its divisors is an integer number (9900528).

Almost surely, 2^26401406 is an apocalyptic number.

26401406 is a deficient number, since it is larger than the sum of its proper divisors (13200706).

26401406 is a wasteful number, since it uses less digits than its factorization.

26401406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200705.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 26401406 is about 5138.2298508338. The cubic root of 26401406 is about 297.7663965086.

Adding to 26401406 its reverse (60410462), we get a palindrome (86811868).

The spelling of 26401406 in words is "twenty-six million, four hundred one thousand, four hundred six".