1240216458 has 16 divisors (see below), whose sum is σ = 2671235616. Its totient is φ = 381605040.

The previous prime is 1240216457. The next prime is 1240216459. The reversal of 1240216458 is 8546120421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1240216457) and next prime (1240216459).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1240216457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7950028 + ... + 7950183.

It is an arithmetic number, because the mean of its divisors is an integer number (166952226).

Almost surely, 2^1240216458 is an apocalyptic number.

1240216458 is an abundant number, since it is smaller than the sum of its proper divisors (1431019158).

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

1240216458 is a wasteful number, since it uses less digits than its factorization.

1240216458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15900229.

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 1240216458 is about 35216.7070862680. The cubic root of 1240216458 is about 1074.3995804845.

Adding to 1240216458 its reverse (8546120421), we get a palindrome (9786336879).

The spelling of 1240216458 in words is "one billion, two hundred forty million, two hundred sixteen thousand, four hundred fifty-eight".