1240400442 has 32 divisors (see below), whose sum is σ = 2590392960. Its totient is φ = 395225600.

The previous prime is 1240400407. The next prime is 1240400507. The reversal of 1240400442 is 2440040421.

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, 384934 + ... + 388142.

It is an arithmetic number, because the mean of its divisors is an integer number (80949780).

Almost surely, 2^1240400442 is an apocalyptic number.

1240400442 is an abundant number, since it is smaller than the sum of its proper divisors (1349992518).

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

1240400442 is a wasteful number, since it uses less digits than its factorization.

1240400442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6038.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 1240400442 is about 35219.3191586663. The cubic root of 1240400442 is about 1074.4527063071.

Adding to 1240400442 its reverse (2440040421), we get a palindrome (3680440863).

The spelling of 1240400442 in words is "one billion, two hundred forty million, four hundred thousand, four hundred forty-two".