1240365140 has 48 divisors (see below), whose sum is σ = 3005812992. Its totient is φ = 421134336.

The previous prime is 1240365131. The next prime is 1240365151. The reversal of 1240365140 is 415630421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28589 + ... + 57428.

It is an arithmetic number, because the mean of its divisors is an integer number (62621104).

Almost surely, 2^1240365140 is an apocalyptic number.

1240365140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240365140 is an abundant number, since it is smaller than the sum of its proper divisors (1765447852).

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

1240365140 is a wasteful number, since it uses less digits than its factorization.

1240365140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86136 (or 86134 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1240365140 is about 35218.8179813008. The cubic root of 1240365140 is about 1074.4425131770.

Adding to 1240365140 its reverse (415630421), we get a palindrome (1655995561).

The spelling of 1240365140 in words is "one billion, two hundred forty million, three hundred sixty-five thousand, one hundred forty".