1240267340 has 72 divisors (see below), whose sum is σ = 2854949328. Its totient is φ = 452325120.

The previous prime is 1240267337. The next prime is 1240267367. The reversal of 1240267340 is 437620421.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278330 + ... + 282750.

It is an arithmetic number, because the mean of its divisors is an integer number (39652074).

Almost surely, 2^1240267340 is an apocalyptic number.

1240267340 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 1240267340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1427474664).

1240267340 is an abundant number, since it is smaller than the sum of its proper divisors (1614681988).

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

1240267340 is a wasteful number, since it uses less digits than its factorization.

1240267340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4524 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 1240267340 is about 35217.4294916594. The cubic root of 1240267340 is about 1074.4142733100.

Adding to 1240267340 its reverse (437620421), we get a palindrome (1677887761).

The spelling of 1240267340 in words is "one billion, two hundred forty million, two hundred sixty-seven thousand, three hundred forty".