264787216 has 40 divisors (see below), whose sum is σ = 524723360. Its totient is φ = 129406464.

The previous prime is 264787183. The next prime is 264787241. The reversal of 264787216 is 612787462.

It is a super-2 number, since 2×264787216² = 140224539514061312, which contains 22 as substring.

It is a nialpdrome in base 16.

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, 148120 + ... + 149896.

It is an arithmetic number, because the mean of its divisors is an integer number (13118084).

Almost surely, 2^264787216 is an apocalyptic number.

It is an amenable number.

264787216 is a deficient number, since it is larger than the sum of its proper divisors (259936144).

264787216 is a wasteful number, since it uses less digits than its factorization.

264787216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991 (or 1985 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 264787216 is about 16272.2836750101. The cubic root of 264787216 is about 642.1438651720.

The spelling of 264787216 in words is "two hundred sixty-four million, seven hundred eighty-seven thousand, two hundred sixteen".