26550390 has 32 divisors (see below), whose sum is σ = 64189440. Its totient is φ = 7028064.

The previous prime is 26550371. The next prime is 26550397. The reversal of 26550390 is 9305562.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26550397) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 987 + ... + 7353.

It is an arithmetic number, because the mean of its divisors is an integer number (2005920).

Almost surely, 2^26550390 is an apocalyptic number.

26550390 is an abundant number, since it is smaller than the sum of its proper divisors (37639050).

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

26550390 is a wasteful number, since it uses less digits than its factorization.

26550390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6516.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 26550390 is about 5152.7070555195. The cubic root of 26550390 is about 298.3254480887.

The spelling of 26550390 in words is "twenty-six million, five hundred fifty thousand, three hundred ninety".