26390240 has 48 divisors (see below), whose sum is σ = 65635920. Its totient is φ = 9999360.

The previous prime is 26390201. The next prime is 26390257. The reversal of 26390240 is 4209362.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301 + ... + 7380.

It is an arithmetic number, because the mean of its divisors is an integer number (1367415).

Almost surely, 2^26390240 is an apocalyptic number.

26390240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26390240 is an abundant number, since it is smaller than the sum of its proper divisors (39245680).

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

26390240 is a wasteful number, since it uses less digits than its factorization.

26390240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715 (or 8707 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 26390240 is about 5137.1431749563. The cubic root of 26390240 is about 297.7244122745.

The spelling of 26390240 in words is "twenty-six million, three hundred ninety thousand, two hundred forty".