26430138 has 96 divisors (see below), whose sum is σ = 72019584. Its totient is φ = 7091712.

The previous prime is 26430133. The next prime is 26430139. The reversal of 26430138 is 83103462.

It is a happy number.

26430138 is a `hidden beast` number, since 2 + 643 + 0 + 13 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26430133) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 57606 + ... + 58062.

It is an arithmetic number, because the mean of its divisors is an integer number (750204).

Almost surely, 2^26430138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26430138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36009792).

26430138 is an abundant number, since it is smaller than the sum of its proper divisors (45589446).

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

26430138 is a wasteful number, since it uses less digits than its factorization.

26430138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 26430138 is about 5141.0249950764. The cubic root of 26430138 is about 297.8743746269.

The spelling of 26430138 in words is "twenty-six million, four hundred thirty thousand, one hundred thirty-eight".