3961915020 has 288 divisors, whose sum is σ = 14157351936. Its totient is φ = 878169600.

The previous prime is 3961915003. The next prime is 3961915021. The reversal of 3961915020 is 205191693.

3961915020 is a `hidden beast` number, since 3 + 9 + 61 + 91 + 502 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3961915021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5993490 + ... + 5994150.

It is an arithmetic number, because the mean of its divisors is an integer number (49157472).

Almost surely, 2^3961915020 is an apocalyptic number.

3961915020 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 3961915020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7078675968).

3961915020 is an abundant number, since it is smaller than the sum of its proper divisors (10195436916).

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

3961915020 is a wasteful number, since it uses less digits than its factorization.

3961915020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 3961915020 is about 62943.7448838246. The cubic root of 3961915020 is about 1582.3469660270.

The spelling of 3961915020 in words is "three billion, nine hundred sixty-one million, nine hundred fifteen thousand, twenty".