263423740 has 48 divisors (see below), whose sum is σ = 578027520. Its totient is φ = 100722240.

The previous prime is 263423723. The next prime is 263423749. The reversal of 263423740 is 47324362.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263423749) 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, 48901 + ... + 54019.

It is an arithmetic number, because the mean of its divisors is an integer number (12042240).

Almost surely, 2^263423740 is an apocalyptic number.

263423740 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 263423740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289013760).

263423740 is an abundant number, since it is smaller than the sum of its proper divisors (314603780).

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

263423740 is a wasteful number, since it uses less digits than its factorization.

263423740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242 (or 5240 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 31.

The square root of 263423740 is about 16230.3339460407. Note that the first 3 decimals coincide. The cubic root of 263423740 is about 641.0397649272.

The spelling of 263423740 in words is "two hundred sixty-three million, four hundred twenty-three thousand, seven hundred forty".