263030640 has 40 divisors (see below), whose sum is σ = 815395728. Its totient is φ = 70141440.

The previous prime is 263030639. The next prime is 263030641. The reversal of 263030640 is 46030362.

It is an interprime number because it is at equal distance from previous prime (263030639) and next prime (263030641).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 263030640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263030641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 547741 + ... + 548220.

Almost surely, 2^263030640 is an apocalyptic number.

263030640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263030640 is an abundant number, since it is smaller than the sum of its proper divisors (552365088).

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

263030640 is a wasteful number, since it uses less digits than its factorization.

263030640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095977 (or 1095971 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 263030640 is about 16218.2193843837. The cubic root of 263030640 is about 640.7207375142.

The spelling of 263030640 in words is "two hundred sixty-three million, thirty thousand, six hundred forty".