1002645856 has 24 divisors (see below), whose sum is σ = 2090075400. Its totient is φ = 471833088.

The previous prime is 1002645841. The next prime is 1002645859. The reversal of 1002645856 is 6585462001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002645859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 921006 + ... + 922093.

It is an arithmetic number, because the mean of its divisors is an integer number (87086475).

Almost surely, 2^1002645856 is an apocalyptic number.

1002645856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1002645856 is an abundant number, since it is smaller than the sum of its proper divisors (1087429544).

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

1002645856 is a wasteful number, since it uses less digits than its factorization.

1002645856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843126 (or 1843118 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 1002645856 is about 31664.5836227164. The cubic root of 1002645856 is about 1000.8811753020.

The spelling of 1002645856 in words is "one billion, two million, six hundred forty-five thousand, eight hundred fifty-six".