3986998236 has 72 divisors (see below), whose sum is σ = 11491959024. Its totient is φ = 1154603520.

The previous prime is 3986998229. The next prime is 3986998241. The reversal of 3986998236 is 6328996893.

3986998236 is a `hidden beast` number, since 398 + 6 + 9 + 9 + 8 + 236 = 666.

It is a super-2 number, since 2×3986998236² = 31792309867734223392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242610 + ... + 258521.

It is an arithmetic number, because the mean of its divisors is an integer number (159610542).

Almost surely, 2^3986998236 is an apocalyptic number.

3986998236 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3986998236 is an abundant number, since it is smaller than the sum of its proper divisors (7504960788).

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

3986998236 is a wasteful number, since it uses less digits than its factorization.

3986998236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501171 (or 501166 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The square root of 3986998236 is about 63142.6815711845. The cubic root of 3986998236 is about 1585.6792672777.

The spelling of 3986998236 in words is "three billion, nine hundred eighty-six million, nine hundred ninety-eight thousand, two hundred thirty-six".