263076640 has 24 divisors (see below), whose sum is σ = 621518940. Its totient is φ = 105230592.

The previous prime is 263076637. The next prime is 263076643. The reversal of 263076640 is 46670362.

It is an interprime number because it is at equal distance from previous prime (263076637) and next prime (263076643).

It can be written as a sum of positive squares in 2 ways, for example, as 254338704 + 8737936 = 15948^2 + 2956^2 .

It is a junction number, because it is equal to n+sod(n) for n = 263076596 and 263076605.

It is not an unprimeable number, because it can be changed into a prime (263076643) 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, 821955 + ... + 822274.

Almost surely, 2^263076640 is an apocalyptic number.

263076640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263076640 is an abundant number, since it is smaller than the sum of its proper divisors (358442300).

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

263076640 is a wasteful number, since it uses less digits than its factorization.

263076640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644244 (or 1644236 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 263076640 is about 16219.6374805357. The cubic root of 263076640 is about 640.7580860603.

The spelling of 263076640 in words is "two hundred sixty-three million, seventy-six thousand, six hundred forty".