263428 has 12 divisors (see below), whose sum is σ = 502992. Its totient is φ = 119720.

The previous prime is 263423. The next prime is 263429. The reversal of 263428 is 824362.

It is a happy number.

263428 is nontrivially palindromic in base 16.

It is a super-2 number, since 2×263428² = 138788622368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (263423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2950 + ... + 3037.

It is an arithmetic number, because the mean of its divisors is an integer number (41916).

263428 is a Friedman number, since it can be written as 4+28^3*6*2, using all its digits and the basic arithmetic operations.

2²⁶³⁴²⁸ is an apocalyptic number.

It is an amenable number.

263428 is a deficient number, since it is larger than the sum of its proper divisors (239564).

263428 is a wasteful number, since it uses less digits than its factorization.

263428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002 (or 6000 counting only the distinct ones).

The product of its digits is 2304, while the sum is 25.

The square root of 263428 is about 513.2523745683. The cubic root of 263428 is about 64.1043220468.

It can be divided in two parts, 2634 and 28, that added together give a palindrome (2662).

The spelling of 263428 in words is "two hundred sixty-three thousand, four hundred twenty-eight".