26404642 has 32 divisors (see below), whose sum is σ = 45864000. Its totient is φ = 11275200.

The previous prime is 26404639. The next prime is 26404649. The reversal of 26404642 is 24640462.

It is a self number, because there is not a number n which added to its sum of digits gives 26404642.

It is not an unprimeable number, because it can be changed into a prime (26404649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75484 + ... + 75832.

It is an arithmetic number, because the mean of its divisors is an integer number (1433250).

Almost surely, 2^26404642 is an apocalyptic number.

26404642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

26404642 is a deficient number, since it is larger than the sum of its proper divisors (19459358).

26404642 is a wasteful number, since it uses less digits than its factorization.

26404642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 26404642 is about 5138.5447356231. The cubic root of 26404642 is about 297.7785616775.

The spelling of 26404642 in words is "twenty-six million, four hundred four thousand, six hundred forty-two".