1002807864 has 40 divisors (see below), whose sum is σ = 2808792360. Its totient is φ = 334269072.

The previous prime is 1002807863. The next prime is 1002807881. The reversal of 1002807864 is 4687082001.

1002807864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1002807864² = 2011247224200484992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002807863) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 773124 + ... + 774419.

It is an arithmetic number, because the mean of its divisors is an integer number (70219809).

Almost surely, 2^1002807864 is an apocalyptic number.

It is an amenable number.

1002807864 is an abundant number, since it is smaller than the sum of its proper divisors (1805984496).

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

1002807864 is a wasteful number, since it uses less digits than its factorization.

1002807864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547561 (or 1547548 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1002807864 is about 31667.1417087176. The cubic root of 1002807864 is about 1000.9350800195.

Adding to 1002807864 its reverse (4687082001), we get a palindrome (5689889865).

The spelling of 1002807864 in words is "one billion, two million, eight hundred seven thousand, eight hundred sixty-four".