26078440 has 32 divisors (see below), whose sum is σ = 60572160. Its totient is φ = 10094400.

The previous prime is 26078417. The next prime is 26078443. The reversal of 26078440 is 4487062.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (26078443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9276 + ... + 11755.

It is an arithmetic number, because the mean of its divisors is an integer number (1892880).

Almost surely, 2^26078440 is an apocalyptic number.

26078440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26078440 is an abundant number, since it is smaller than the sum of its proper divisors (34493720).

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

26078440 is a wasteful number, since it uses less digits than its factorization.

26078440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21073 (or 21069 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 26078440 is about 5106.7053958497. The cubic root of 26078440 is about 296.5472284990.

The spelling of 26078440 in words is "twenty-six million, seventy-eight thousand, four hundred forty".