1240475540 has 24 divisors (see below), whose sum is σ = 2689032192. Its totient is φ = 480183840.

The previous prime is 1240475539. The next prime is 1240475563. The reversal of 1240475540 is 455740421.

It is a junction number, because it is equal to n+sod(n) for n = 1240475497 and 1240475506.

It is a congruent number.

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, 999764 + ... + 1001003.

It is an arithmetic number, because the mean of its divisors is an integer number (112043008).

Almost surely, 2^1240475540 is an apocalyptic number.

1240475540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240475540 is an abundant number, since it is smaller than the sum of its proper divisors (1448556652).

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

1240475540 is a wasteful number, since it uses less digits than its factorization.

1240475540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000807 (or 2000805 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 32.

The square root of 1240475540 is about 35220.3852903400. The cubic root of 1240475540 is about 1074.4743895255.

The spelling of 1240475540 in words is "one billion, two hundred forty million, four hundred seventy-five thousand, five hundred forty".