26421240 has 32 divisors (see below), whose sum is σ = 79264080. Its totient is φ = 7045632.

The previous prime is 26421223. The next prime is 26421253. The reversal of 26421240 is 4212462.

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, 109969 + ... + 110208.

Almost surely, 2^26421240 is an apocalyptic number.

26421240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26421240 is an abundant number, since it is smaller than the sum of its proper divisors (52842840).

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

26421240 is a wasteful number, since it uses less digits than its factorization.

26421240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220191 (or 220187 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 26421240 is about 5140.1595305982. The cubic root of 26421240 is about 297.8409433009.

The spelling of 26421240 in words is "twenty-six million, four hundred twenty-one thousand, two hundred forty".