3999870438 has 8 divisors (see below), whose sum is σ = 7999740888. Its totient is φ = 1333290144.

The previous prime is 3999870437. The next prime is 3999870439. The reversal of 3999870438 is 8340789993.

It is an interprime number because it is at equal distance from previous prime (3999870437) and next prime (3999870439).

It is a sphenic number, since it is the product of 3 distinct primes.

3999870438 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999870437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333322531 + ... + 333322542.

It is an arithmetic number, because the mean of its divisors is an integer number (999967611).

Almost surely, 2^3999870438 is an apocalyptic number.

3999870438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3999870438 is a wasteful number, since it uses less digits than its factorization.

3999870438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666645078.

The product of its (nonzero) digits is 11757312, while the sum is 60.

The square root of 3999870438 is about 63244.5289175277. The cubic root of 3999870438 is about 1587.3839128786.

The spelling of 3999870438 in words is "three billion, nine hundred ninety-nine million, eight hundred seventy thousand, four hundred thirty-eight".