26564620 has 12 divisors (see below), whose sum is σ = 55785744. Its totient is φ = 10625840.

The previous prime is 26564617. The next prime is 26564647. The reversal of 26564620 is 2646562.

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, 664096 + ... + 664135.

It is an arithmetic number, because the mean of its divisors is an integer number (4648812).

Almost surely, 2^26564620 is an apocalyptic number.

26564620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26564620 is an abundant number, since it is smaller than the sum of its proper divisors (29221124).

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

26564620 is a wasteful number, since it uses less digits than its factorization.

26564620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328240 (or 1328238 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 26564620 is about 5154.0876981285. The cubic root of 26564620 is about 298.3787356040.

The spelling of 26564620 in words is "twenty-six million, five hundred sixty-four thousand, six hundred twenty".