1002840240 has 40 divisors (see below), whose sum is σ = 3108805488. Its totient is φ = 267424000.

The previous prime is 1002840191. The next prime is 1002840247. The reversal of 1002840240 is 420482001.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1002840247) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2089011 + ... + 2089490.

Almost surely, 2^1002840240 is an apocalyptic number.

1002840240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002840240 is an abundant number, since it is smaller than the sum of its proper divisors (2105965248).

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

1002840240 is a wasteful number, since it uses less digits than its factorization.

1002840240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4178517 (or 4178511 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1002840240 is about 31667.6528969231. The cubic root of 1002840240 is about 1000.9458517491.

The spelling of 1002840240 in words is "one billion, two million, eight hundred forty thousand, two hundred forty".