1002165040 has 40 divisors (see below), whose sum is σ = 2333788128. Its totient is φ = 400220160.

The previous prime is 1002165037. The next prime is 1002165053. The reversal of 1002165040 is 405612001.

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

It is a junction number, because it is equal to n+sod(n) for n = 1002164999 and 1002165017.

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, 41509 + ... + 61051.

Almost surely, 2^1002165040 is an apocalyptic number.

1002165040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1002165040 is an abundant number, since it is smaller than the sum of its proper divisors (1331623088).

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

1002165040 is a wasteful number, since it uses less digits than its factorization.

1002165040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20197 (or 20191 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 1002165040 is about 31656.9903812728. The cubic root of 1002165040 is about 1000.7211598035.

Adding to 1002165040 its reverse (405612001), we get a palindrome (1407777041).

The spelling of 1002165040 in words is "one billion, two million, one hundred sixty-five thousand, forty".