26557040 has 40 divisors (see below), whose sum is σ = 63879840. Its totient is φ = 10255616.

The previous prime is 26557033. The next prime is 26557061. The reversal of 26557040 is 4075562.

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 (29).

It is a junction number, because it is equal to n+sod(n) for n = 26556994 and 26557012.

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, 3404 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (1596996).

Almost surely, 2^26557040 is an apocalyptic number.

26557040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26557040 is an abundant number, since it is smaller than the sum of its proper divisors (37322800).

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

26557040 is a wasteful number, since it uses less digits than its factorization.

26557040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11489 (or 11483 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 26557040 is about 5153.3523069940. The cubic root of 26557040 is about 298.3503529159.

The spelling of 26557040 in words is "twenty-six million, five hundred fifty-seven thousand, forty".