263947140 has 48 divisors (see below), whose sum is σ = 821170560. Its totient is φ = 70385760.

The previous prime is 263947139. The next prime is 263947141. The reversal of 263947140 is 41749362.

263947140 is a `hidden beast` number, since 2 + 639 + 4 + 7 + 14 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (263947139) and next prime (263947141).

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 = 263947095 and 263947104.

It is not an unprimeable number, because it can be changed into a prime (263947141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 243856 + ... + 244935.

It is an arithmetic number, because the mean of its divisors is an integer number (17107720).

Almost surely, 2^263947140 is an apocalyptic number.

263947140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263947140 is an abundant number, since it is smaller than the sum of its proper divisors (557223420).

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

263947140 is a wasteful number, since it uses less digits than its factorization.

263947140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488809 (or 488801 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 263947140 is about 16246.4500737853. The cubic root of 263947140 is about 641.4640474178.

The spelling of 263947140 in words is "two hundred sixty-three million, nine hundred forty-seven thousand, one hundred forty".