2865406872 has 32 divisors (see below), whose sum is σ = 7540545600. Its totient is φ = 904865184.

The previous prime is 2865406823. The next prime is 2865406903. The reversal of 2865406872 is 2786045682.

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, 3141438 + ... + 3142349.

It is an arithmetic number, because the mean of its divisors is an integer number (235642050).

Almost surely, 2^2865406872 is an apocalyptic number.

It is an amenable number.

2865406872 is an abundant number, since it is smaller than the sum of its proper divisors (4675138728).

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

2865406872 is a wasteful number, since it uses less digits than its factorization.

2865406872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6283815 (or 6283811 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 2865406872 is about 53529.4953460240. The cubic root of 2865406872 is about 1420.3501867272.

The spelling of 2865406872 in words is "two billion, eight hundred sixty-five million, four hundred six thousand, eight hundred seventy-two".