264890805 has 16 divisors (see below), whose sum is σ = 427788864. Its totient is φ = 139953920.

The previous prime is 264890797. The next prime is 264890809. The reversal of 264890805 is 508098462.

It is not a de Polignac number, because 264890805 - 2³ = 264890797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264890809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80916 + ... + 84125.

It is an arithmetic number, because the mean of its divisors is an integer number (26736804).

Almost surely, 2^264890805 is an apocalyptic number.

It is an amenable number.

264890805 is a deficient number, since it is larger than the sum of its proper divisors (162898059).

264890805 is a wasteful number, since it uses less digits than its factorization.

264890805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165156.

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 264890805 is about 16275.4663527654. The cubic root of 264890805 is about 642.2275932428.

The spelling of 264890805 in words is "two hundred sixty-four million, eight hundred ninety thousand, eight hundred five".