3989990970 has 96 divisors (see below), whose sum is σ = 11888967168. Its totient is φ = 909460224.

The previous prime is 3989990929. The next prime is 3989990971. The reversal of 3989990970 is 790999893.

3989990970 is a `hidden beast` number, since 398 + 99 + 90 + 9 + 70 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 3989990898 and 3989990907.

It is not an unprimeable number, because it can be changed into a prime (3989990971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 222582 + ... + 239838.

It is an arithmetic number, because the mean of its divisors is an integer number (123843408).

Almost surely, 2^3989990970 is an apocalyptic number.

3989990970 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3989990970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5944483584).

3989990970 is an abundant number, since it is smaller than the sum of its proper divisors (7898976198).

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

3989990970 is a wasteful number, since it uses less digits than its factorization.

3989990970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17644 (or 17641 counting only the distinct ones).

The product of its (nonzero) digits is 9920232, while the sum is 63.

The square root of 3989990970 is about 63166.3753115532. The cubic root of 3989990970 is about 1586.0759173476.

The spelling of 3989990970 in words is "three billion, nine hundred eighty-nine million, nine hundred ninety thousand, nine hundred seventy".