26402985 has 48 divisors (see below), whose sum is σ = 53015040. Its totient is φ = 11905920.

The previous prime is 26402969. The next prime is 26402993. The reversal of 26402985 is 58920462.

It is a happy number.

26402985 is a `hidden beast` number, since 2 + 640 + 2 + 9 + 8 + 5 = 666.

It is not a de Polignac number, because 26402985 - 2⁴ = 26402969 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24355 + ... + 25415.

It is an arithmetic number, because the mean of its divisors is an integer number (1104480).

Almost surely, 2^26402985 is an apocalyptic number.

It is an amenable number.

26402985 is an abundant number, since it is smaller than the sum of its proper divisors (26612055).

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

26402985 is a wasteful number, since it uses less digits than its factorization.

26402985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 26402985 is about 5138.3835006741. The cubic root of 26402985 is about 297.7723326036.

It can be divided in two parts, 2640 and 2985, that added together give a square (5625 = 75²).

The spelling of 26402985 in words is "twenty-six million, four hundred two thousand, nine hundred eighty-five".