26563440 has 40 divisors (see below), whose sum is σ = 82347408. Its totient is φ = 7083520.

The previous prime is 26563429. The next prime is 26563477. The reversal of 26563440 is 4436562.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 26563398 and 26563407.

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, 55101 + ... + 55580.

Almost surely, 2^26563440 is an apocalyptic number.

26563440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26563440 is an abundant number, since it is smaller than the sum of its proper divisors (55783968).

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

26563440 is a wasteful number, since it uses less digits than its factorization.

26563440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110697 (or 110691 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 26563440 is about 5153.9732246103. The cubic root of 26563440 is about 298.3743175457.

The spelling of 26563440 in words is "twenty-six million, five hundred sixty-three thousand, four hundred forty".