1263223740 has 48 divisors (see below), whose sum is σ = 3723189120. Its totient is φ = 319129920.

The previous prime is 1263223739. The next prime is 1263223823. The reversal of 1263223740 is 473223621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1263223698 and 1263223707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552906 + ... + 555185.

It is an arithmetic number, because the mean of its divisors is an integer number (77566440).

Almost surely, 2^1263223740 is an apocalyptic number.

1263223740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263223740 is an abundant number, since it is smaller than the sum of its proper divisors (2459965380).

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

1263223740 is a wasteful number, since it uses less digits than its factorization.

1263223740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108122 (or 1108120 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 1263223740 is about 35541.8589834578. The cubic root of 1263223740 is about 1081.0026525437.

The spelling of 1263223740 in words is "one billion, two hundred sixty-three million, two hundred twenty-three thousand, seven hundred forty".