3999441420 has 240 divisors, whose sum is σ = 14307578208. Its totient is φ = 926484480.

The previous prime is 3999441419. The next prime is 3999441443. The reversal of 3999441420 is 241449993.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 352435 + ... + 363605.

Almost surely, 2^3999441420 is an apocalyptic number.

3999441420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999441420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7153789104).

3999441420 is an abundant number, since it is smaller than the sum of its proper divisors (10308136788).

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

3999441420 is a wasteful number, since it uses less digits than its factorization.

3999441420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11222 (or 11211 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 3999441420 is about 63241.1370865515. The cubic root of 3999441420 is about 1587.3271576551.

The spelling of 3999441420 in words is "three billion, nine hundred ninety-nine million, four hundred forty-one thousand, four hundred twenty".