263380005 has 80 divisors (see below), whose sum is σ = 548786304. Its totient is φ = 118350720.

The previous prime is 263380003. The next prime is 263380009. The reversal of 263380005 is 500083362.

It is not a de Polignac number, because 263380005 - 2¹ = 263380003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263380003) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 172174 + ... + 173696.

Almost surely, 2^263380005 is an apocalyptic number.

It is an amenable number.

263380005 is an abundant number, since it is smaller than the sum of its proper divisors (285406299).

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

263380005 is a wasteful number, since it uses less digits than its factorization.

263380005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1608 (or 1599 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 263380005 is about 16228.9865672506. The cubic root of 263380005 is about 641.0042866951.

The spelling of 263380005 in words is "two hundred sixty-three million, three hundred eighty thousand, five".