26273440 has 24 divisors (see below), whose sum is σ = 62071380. Its totient is φ = 10509312.

The previous prime is 26273407. The next prime is 26273453. The reversal of 26273440 is 4437262.

It can be written as a sum of positive squares in 2 ways, for example, as 24324624 + 1948816 = 4932^2 + 1396^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26273399 and 26273408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81945 + ... + 82264.

Almost surely, 2^26273440 is an apocalyptic number.

26273440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26273440 is an abundant number, since it is smaller than the sum of its proper divisors (35797940).

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

26273440 is a wasteful number, since it uses less digits than its factorization.

26273440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164224 (or 164216 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 26273440 is about 5125.7623823193. The cubic root of 26273440 is about 297.2845319752.

The spelling of 26273440 in words is "twenty-six million, two hundred seventy-three thousand, four hundred forty".