263279340 has 144 divisors (see below), whose sum is σ = 855271872. Its totient is φ = 65323008.

The previous prime is 263279329. The next prime is 263279347. The reversal of 263279340 is 43972362.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 263279295 and 263279304.

It is not an unprimeable number, because it can be changed into a prime (263279347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 296377 + ... + 297263.

It is an arithmetic number, because the mean of its divisors is an integer number (5939388).

Almost surely, 2^263279340 is an apocalyptic number.

263279340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263279340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (427635936).

263279340 is an abundant number, since it is smaller than the sum of its proper divisors (591992532).

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

263279340 is a wasteful number, since it uses less digits than its factorization.

263279340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 263279340 is about 16225.8848757163. The cubic root of 263279340 is about 640.9226113998.

The spelling of 263279340 in words is "two hundred sixty-three million, two hundred seventy-nine thousand, three hundred forty".