264778285 has 8 divisors (see below), whose sum is σ = 327983616. Its totient is φ = 204989520.

The previous prime is 264778279. The next prime is 264778291. The reversal of 264778285 is 582877462.

264778285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (264778279) and next prime (264778291).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 264778285 - 2¹⁷ = 264647213 is a prime.

It is a Duffinian number.

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, 853969 + ... + 854278.

It is an arithmetic number, because the mean of its divisors is an integer number (40997952).

Almost surely, 2^264778285 is an apocalyptic number.

It is an amenable number.

264778285 is a deficient number, since it is larger than the sum of its proper divisors (63205331).

264778285 is a wasteful number, since it uses less digits than its factorization.

264778285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708283.

The product of its digits is 1505280, while the sum is 49.

The square root of 264778285 is about 16272.0092490141. The cubic root of 264778285 is about 642.1366454738.

The spelling of 264778285 in words is "two hundred sixty-four million, seven hundred seventy-eight thousand, two hundred eighty-five".