3998505504 has 96 divisors (see below), whose sum is σ = 12159987840. Its totient is φ = 1126766592.

The previous prime is 3998505499. The next prime is 3998505523. The reversal of 3998505504 is 4055058993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8302 + ... + 89810.

It is an arithmetic number, because the mean of its divisors is an integer number (126666540).

Almost surely, 2^3998505504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3998505504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6079993920).

3998505504 is an abundant number, since it is smaller than the sum of its proper divisors (8161482336).

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

3998505504 is a wasteful number, since it uses less digits than its factorization.

3998505504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81602 (or 81594 counting only the distinct ones).

The product of its (nonzero) digits is 972000, while the sum is 48.

The square root of 3998505504 is about 63233.7370712818. The cubic root of 3998505504 is about 1587.2033302981.

The spelling of 3998505504 in words is "three billion, nine hundred ninety-eight million, five hundred five thousand, five hundred four".