1240805740 has 24 divisors (see below), whose sum is σ = 2624443920. Its totient is φ = 492750528.

The previous prime is 1240805729. The next prime is 1240805777. The reversal of 1240805740 is 475080421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220387 + ... + 225946.

It is an arithmetic number, because the mean of its divisors is an integer number (109351830).

Almost surely, 2^1240805740 is an apocalyptic number.

1240805740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240805740 is an abundant number, since it is smaller than the sum of its proper divisors (1383638180).

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

1240805740 is a wasteful number, since it uses less digits than its factorization.

1240805740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446481 (or 446479 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 1240805740 is about 35225.0726046093. The cubic root of 1240805740 is about 1074.5697185495.

The spelling of 1240805740 in words is "one billion, two hundred forty million, eight hundred five thousand, seven hundred forty".