1240402860 has 72 divisors (see below), whose sum is σ = 3814137600. Its totient is φ = 326239488.

The previous prime is 1240402829. The next prime is 1240402871. The reversal of 1240402860 is 682040421.

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, 34060 + ... + 60339.

Almost surely, 2^1240402860 is an apocalyptic number.

1240402860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240402860 is an abundant number, since it is smaller than the sum of its proper divisors (2573734740).

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

1240402860 is a wasteful number, since it uses less digits than its factorization.

1240402860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94487 (or 94482 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1240402860 is about 35219.3534864001. The cubic root of 1240402860 is about 1074.4534044754.

The spelling of 1240402860 in words is "one billion, two hundred forty million, four hundred two thousand, eight hundred sixty".