4005123870 has 32 divisors (see below), whose sum is σ = 10486143360. Its totient is φ = 970939040.

The previous prime is 4005123869. The next prime is 4005123917. The reversal of 4005123870 is 783215004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6068040 + ... + 6068699.

It is an arithmetic number, because the mean of its divisors is an integer number (327691980).

Almost surely, 2^4005123870 is an apocalyptic number.

4005123870 is an abundant number, since it is smaller than the sum of its proper divisors (6481019490).

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

4005123870 is a wasteful number, since it uses less digits than its factorization.

4005123870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12136760.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 4005123870 is about 63286.0479884785. The cubic root of 4005123870 is about 1588.0785658118.

Adding to 4005123870 its reverse (783215004), we get a palindrome (4788338874).

The spelling of 4005123870 in words is "four billion, five million, one hundred twenty-three thousand, eight hundred seventy".