264021816 has 32 divisors (see below), whose sum is σ = 661800960. Its totient is φ = 87774432.

The previous prime is 264021811. The next prime is 264021817. The reversal of 264021816 is 618120462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264021811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5170 + ... + 23553.

It is an arithmetic number, because the mean of its divisors is an integer number (20681280).

Almost surely, 2^264021816 is an apocalyptic number.

It is an amenable number.

264021816 is an abundant number, since it is smaller than the sum of its proper divisors (397779144).

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

264021816 is a wasteful number, since it uses less digits than its factorization.

264021816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29115 (or 29111 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 264021816 is about 16248.7481363950. The cubic root of 264021816 is about 641.5245361107.

The spelling of 264021816 in words is "two hundred sixty-four million, twenty-one thousand, eight hundred sixteen".