263388420 has 72 divisors (see below), whose sum is σ = 800270016. Its totient is φ = 70120512.

The previous prime is 263388401. The next prime is 263388443. The reversal of 263388420 is 24883362.

263388420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201489 + ... + 202791.

Almost surely, 2^263388420 is an apocalyptic number.

263388420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263388420 is an abundant number, since it is smaller than the sum of its proper divisors (536881596).

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

263388420 is a wasteful number, since it uses less digits than its factorization.

263388420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2436 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 263388420 is about 16229.2458235126. The cubic root of 263388420 is about 641.0111133252.

The spelling of 263388420 in words is "two hundred sixty-three million, three hundred eighty-eight thousand, four hundred twenty".