263454540 has 24 divisors (see below), whose sum is σ = 737672880. Its totient is φ = 70254528.

The previous prime is 263454539. The next prime is 263454553. The reversal of 263454540 is 45454362.

It is a super-2 number, since 2×263454540² = 138816589293223200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2195395 + ... + 2195514.

It is an arithmetic number, because the mean of its divisors is an integer number (30736370).

Almost surely, 2^263454540 is an apocalyptic number.

263454540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263454540 is an abundant number, since it is smaller than the sum of its proper divisors (474218340).

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

263454540 is a wasteful number, since it uses less digits than its factorization.

263454540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4390921 (or 4390919 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

The square root of 263454540 is about 16231.2827589196. The cubic root of 263454540 is about 641.0647478126.

The spelling of 263454540 in words is "two hundred sixty-three million, four hundred fifty-four thousand, five hundred forty".