1240240340 has 24 divisors (see below), whose sum is σ = 2621100552. Its totient is φ = 492935040.

The previous prime is 1240240327. The next prime is 1240240429. The reversal of 1240240340 is 430420421.

It can be written as a sum of positive squares in 4 ways, for example, as 287777296 + 952463044 = 16964^2 + 30862^2 .

It is a super-2 number, since 2×1240240340² = 3076392201926631200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194351 + ... + 200630.

It is an arithmetic number, because the mean of its divisors is an integer number (109212523).

Almost surely, 2^1240240340 is an apocalyptic number.

1240240340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240240340 is an abundant number, since it is smaller than the sum of its proper divisors (1380860212).

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

1240240340 is a wasteful number, since it uses less digits than its factorization.

1240240340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395147 (or 395145 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 1240240340 is about 35217.0461566554. The cubic root of 1240240340 is about 1074.4064767662.

Adding to 1240240340 its reverse (430420421), we get a palindrome (1670660761).

The spelling of 1240240340 in words is "one billion, two hundred forty million, two hundred forty thousand, three hundred forty".