2140409240 has 32 divisors (see below), whose sum is σ = 4906792080. Its totient is φ = 840008832.

The previous prime is 2140409207. The next prime is 2140409267. The reversal of 2140409240 is 429040412.

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, 502694 + ... + 506933.

Almost surely, 2^2140409240 is an apocalyptic number.

2140409240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2140409240 is an abundant number, since it is smaller than the sum of its proper divisors (2766382840).

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

2140409240 is a wasteful number, since it uses less digits than its factorization.

2140409240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009691 (or 1009687 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2140409240 is about 46264.5570604540. The cubic root of 2140409240 is about 1288.7408822758.

Adding to 2140409240 its reverse (429040412), we get a palindrome (2569449652).

The spelling of 2140409240 in words is "two billion, one hundred forty million, four hundred nine thousand, two hundred forty".