263464740 has 144 divisors (see below), whose sum is σ = 996428160. Its totient is φ = 54743040.

The previous prime is 263464717. The next prime is 263464771. The reversal of 263464740 is 47464362.

263464740 is a `hidden beast` number, since 2 + 6 + 3 + 4 + 647 + 4 + 0 = 666.

263464740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 263464695 and 263464704.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4356 + ... + 23364.

It is an arithmetic number, because the mean of its divisors is an integer number (6919640).

Almost surely, 2^263464740 is an apocalyptic number.

263464740 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 263464740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (498214080).

263464740 is an abundant number, since it is smaller than the sum of its proper divisors (732963420).

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

263464740 is a wasteful number, since it uses less digits than its factorization.

263464740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19042 (or 19037 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The square root of 263464740 is about 16231.5969639466. The cubic root of 263464740 is about 641.0730209364.

The spelling of 263464740 in words is "two hundred sixty-three million, four hundred sixty-four thousand, seven hundred forty".