263237940 has 144 divisors (see below), whose sum is σ = 928287360. Its totient is φ = 59132160.

The previous prime is 263237879. The next prime is 263237981. The reversal of 263237940 is 49732362.

It is a happy number.

263237940 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 = 263237895 and 263237904.

It is a congruent number.

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, 72570 + ... + 76110.

It is an arithmetic number, because the mean of its divisors is an integer number (6446440).

Almost surely, 2^263237940 is an apocalyptic number.

263237940 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 263237940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464143680).

263237940 is an abundant number, since it is smaller than the sum of its proper divisors (665049420).

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

263237940 is a wasteful number, since it uses less digits than its factorization.

263237940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3622 (or 3617 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 263237940 is about 16224.6090861999. The cubic root of 263237940 is about 640.8890151606.

The spelling of 263237940 in words is "two hundred sixty-three million, two hundred thirty-seven thousand, nine hundred forty".