263452640 has 48 divisors (see below), whose sum is σ = 678993840. Its totient is φ = 95800320.

The previous prime is 263452633. The next prime is 263452669. The reversal of 263452640 is 46254362.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 263452597 and 263452606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73085 + ... + 76604.

It is an arithmetic number, because the mean of its divisors is an integer number (14145705).

Almost surely, 2^263452640 is an apocalyptic number.

263452640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263452640 is an abundant number, since it is smaller than the sum of its proper divisors (415541200).

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

263452640 is a wasteful number, since it uses less digits than its factorization.

263452640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149715 (or 149707 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 263452640 is about 16231.2242298602. The cubic root of 263452640 is about 641.0632067169.

The spelling of 263452640 in words is "two hundred sixty-three million, four hundred fifty-two thousand, six hundred forty".