1240731420 has 24 divisors (see below), whose sum is σ = 3474048144. Its totient is φ = 330861696.

The previous prime is 1240731409. The next prime is 1240731421. The reversal of 1240731420 is 241370421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240731421) 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, 10339369 + ... + 10339488.

It is an arithmetic number, because the mean of its divisors is an integer number (144752006).

Almost surely, 2^1240731420 is an apocalyptic number.

1240731420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240731420 is an abundant number, since it is smaller than the sum of its proper divisors (2233316724).

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

1240731420 is a wasteful number, since it uses less digits than its factorization.

1240731420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20678869 (or 20678867 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 1240731420 is about 35224.0176584103. The cubic root of 1240731420 is about 1074.5482637766.

The spelling of 1240731420 in words is "one billion, two hundred forty million, seven hundred thirty-one thousand, four hundred twenty".