1240253320 has 64 divisors (see below), whose sum is σ = 2873142000. Its totient is φ = 481489920.

The previous prime is 1240253303. The next prime is 1240253341. The reversal of 1240253320 is 233520421.

It can be written as a sum of positive squares in 8 ways, for example, as 648109764 + 592143556 = 25458^2 + 24334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1240253291 and 1240253300.

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, 799906 + ... + 801454.

Almost surely, 2^1240253320 is an apocalyptic number.

1240253320 is a gapful number since it is divisible by the number (10) 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 1240253320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1436571000).

1240253320 is an abundant number, since it is smaller than the sum of its proper divisors (1632888680).

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

1240253320 is a wasteful number, since it uses less digits than its factorization.

1240253320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138 (or 2134 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1240253320 is about 35217.2304419300. The cubic root of 1240253320 is about 1074.4102248966.

Adding to 1240253320 its reverse (233520421), we get a palindrome (1473773741).

The spelling of 1240253320 in words is "one billion, two hundred forty million, two hundred fifty-three thousand, three hundred twenty".