4129990236 has 18 divisors (see below), whose sum is σ = 10439697632. Its totient is φ = 1376663400.

The previous prime is 4129990223. The next prime is 4129990237. The reversal of 4129990236 is 6320999214.

It is a happy number.

4129990236 is a `hidden beast` number, since 41 + 299 + 90 + 236 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×4129990236³ (a number of 30 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4129990191 and 4129990200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4129990237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 57360940 + ... + 57361011.

Almost surely, 2^4129990236 is an apocalyptic number.

It is an amenable number.

4129990236 is an abundant number, since it is smaller than the sum of its proper divisors (6309707396).

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

4129990236 is a wasteful number, since it uses less digits than its factorization.

4129990236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114721961 (or 114721956 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 4129990236 is about 64265.0000855831. Note that the first 4 decimals coincide. The cubic root of 4129990236 is about 1604.4136257266.

The spelling of 4129990236 in words is "four billion, one hundred twenty-nine million, nine hundred ninety thousand, two hundred thirty-six".