263320264 has 8 divisors (see below), whose sum is σ = 493725510. Its totient is φ = 131660128.

The previous prime is 263320249. The next prime is 263320283. The reversal of 263320264 is 462023362.

It can be written as a sum of positive squares in only one way, i.e., 220522500 + 42797764 = 14850^2 + 6542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×263320264² = 138675122866059392, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16457509 + ... + 16457524.

Almost surely, 2^263320264 is an apocalyptic number.

It is an amenable number.

263320264 is a deficient number, since it is larger than the sum of its proper divisors (230405246).

263320264 is a wasteful number, since it uses less digits than its factorization.

263320264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32915039 (or 32915035 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 263320264 is about 16227.1458981547. The cubic root of 263320264 is about 640.9558179021.

The spelling of 263320264 in words is "two hundred sixty-three million, three hundred twenty thousand, two hundred sixty-four".