3998872347 has 16 divisors (see below), whose sum is σ = 5478070272. Its totient is φ = 2592851040.

The previous prime is 3998872303. The next prime is 3998872357. The reversal of 3998872347 is 7432788993.

It is not a de Polignac number, because 3998872347 - 2⁷ = 3998872219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3998872357) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368838 + ... + 379524.

It is an arithmetic number, because the mean of its divisors is an integer number (342379392).

Almost surely, 2^3998872347 is an apocalyptic number.

3998872347 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3998872347 is a deficient number, since it is larger than the sum of its proper divisors (1479197925).

3998872347 is a wasteful number, since it uses less digits than its factorization.

3998872347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14098.

The product of its digits is 18289152, while the sum is 60.

The square root of 3998872347 is about 63236.6376952475. The cubic root of 3998872347 is about 1587.2518681518.

The spelling of 3998872347 in words is "three billion, nine hundred ninety-eight million, eight hundred seventy-two thousand, three hundred forty-seven".