3984897915 has 12 divisors (see below), whose sum is σ = 6907156464. Its totient is φ = 2125278864.

The previous prime is 3984897893. The next prime is 3984897947. The reversal of 3984897915 is 5197984893.

It is not a de Polignac number, because 3984897915 - 2¹¹ = 3984895867 is a prime.

It is a super-2 number, since 2×3984897915² = 31758822785942694450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44276599 + ... + 44276688.

It is an arithmetic number, because the mean of its divisors is an integer number (575596372).

Almost surely, 2^3984897915 is an apocalyptic number.

3984897915 is a deficient number, since it is larger than the sum of its proper divisors (2922258549).

3984897915 is a wasteful number, since it uses less digits than its factorization.

3984897915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88553298 (or 88553295 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The square root of 3984897915 is about 63126.0478328875. The cubic root of 3984897915 is about 1585.4007770239.

The spelling of 3984897915 in words is "three billion, nine hundred eighty-four million, eight hundred ninety-seven thousand, nine hundred fifteen".