26397378 has 54 divisors (see below), whose sum is σ = 66918969. Its totient is φ = 7498512.

The previous prime is 26397373. The next prime is 26397383. The reversal of 26397378 is 87379362.

It is a happy number.

26397378 is a `hidden beast` number, since 2 + 639 + 7 + 3 + 7 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (26397373) and next prime (26397383).

It can be written as a sum of positive squares in 2 ways, for example, as 20766249 + 5631129 = 4557^2 + 2373^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3633.

It is not an unprimeable number, because it can be changed into a prime (26397373) 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 26 ways as a sum of consecutive naturals, for example, 152500 + ... + 152672.

Almost surely, 2^26397378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26397378

26397378 is an abundant number, since it is smaller than the sum of its proper divisors (40521591).

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

26397378 is a wasteful number, since it uses less digits than its factorization.

26397378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 185 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 26397378 is about 5137.8378721015. The cubic root of 26397378 is about 297.7512525670.

The spelling of 26397378 in words is "twenty-six million, three hundred ninety-seven thousand, three hundred seventy-eight".