3980865420 has 192 divisors, whose sum is σ = 14185113600. Its totient is φ = 907925760.

The previous prime is 3980865407. The next prime is 3980865443. The reversal of 3980865420 is 245680893.

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 63 ways as a sum of consecutive naturals, for example, 2384346 + ... + 2386014.

It is an arithmetic number, because the mean of its divisors is an integer number (73880800).

Almost surely, 2^3980865420 is an apocalyptic number.

3980865420 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 3980865420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7092556800).

3980865420 is an abundant number, since it is smaller than the sum of its proper divisors (10204248180).

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

3980865420 is a wasteful number, since it uses less digits than its factorization.

3980865420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2325 (or 2317 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 3980865420 is about 63094.0997241422. The cubic root of 3980865420 is about 1584.8658174047.

The spelling of 3980865420 in words is "three billion, nine hundred eighty million, eight hundred sixty-five thousand, four hundred twenty".