1240646680 has 384 divisors, whose sum is σ = 3826569600. Its totient is φ = 357654528.

The previous prime is 1240646599. The next prime is 1240646699. The reversal of 1240646680 is 866460421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16995124 + ... + 16995196.

It is an arithmetic number, because the mean of its divisors is an integer number (9965025).

Almost surely, 2^1240646680 is an apocalyptic number.

1240646680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240646680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1913284800).

1240646680 is an abundant number, since it is smaller than the sum of its proper divisors (2585922920).

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

1240646680 is a wasteful number, since it uses less digits than its factorization.

1240646680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 1240646680 is about 35222.8147654329. The cubic root of 1240646680 is about 1074.5237999022.

The spelling of 1240646680 in words is "one billion, two hundred forty million, six hundred forty-six thousand, six hundred eighty".