263354140 has 144 divisors (see below), whose sum is σ = 703084032. Its totient is φ = 80999424.

The previous prime is 263354129. The next prime is 263354159. The reversal of 263354140 is 41453362.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 263354099 and 263354108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 930439 + ... + 930721.

It is an arithmetic number, because the mean of its divisors is an integer number (4882528).

Almost surely, 2^263354140 is an apocalyptic number.

263354140 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 263354140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351542016).

263354140 is an abundant number, since it is smaller than the sum of its proper divisors (439729892).

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

263354140 is a wasteful number, since it uses less digits than its factorization.

263354140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 263354140 is about 16228.1896710631. The cubic root of 263354140 is about 640.9833029222.

The spelling of 263354140 in words is "two hundred sixty-three million, three hundred fifty-four thousand, one hundred forty".