26623640 has 16 divisors (see below), whose sum is σ = 59903280. Its totient is φ = 10649440.

The previous prime is 26623631. The next prime is 26623669. The reversal of 26623640 is 4632662.

It is a congruent number.

It is an unprimeable number.

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, 332756 + ... + 332835.

It is an arithmetic number, because the mean of its divisors is an integer number (3743955).

Almost surely, 2^26623640 is an apocalyptic number.

26623640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26623640 is an abundant number, since it is smaller than the sum of its proper divisors (33279640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26623640 is a wasteful number, since it uses less digits than its factorization.

26623640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665602 (or 665598 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 26623640 is about 5159.8100740240. The cubic root of 26623640 is about 298.5995466819.

The spelling of 26623640 in words is "twenty-six million, six hundred twenty-three thousand, six hundred forty".