3198915720 has 768 divisors, whose sum is σ = 14478912000. Its totient is φ = 611297280.

The previous prime is 3198915683. The next prime is 3198915743. The reversal of 3198915720 is 275198913.

3198915720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11891746 + ... + 11892014.

It is an arithmetic number, because the mean of its divisors is an integer number (18852750).

Almost surely, 2^3198915720 is an apocalyptic number.

3198915720 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 3198915720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7239456000).

3198915720 is an abundant number, since it is smaller than the sum of its proper divisors (11279996280).

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

3198915720 is a wasteful number, since it uses less digits than its factorization.

3198915720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 3198915720 is about 56558.9579111921. The cubic root of 3198915720 is about 1473.4461422510.

The spelling of 3198915720 in words is "three billion, one hundred ninety-eight million, nine hundred fifteen thousand, seven hundred twenty".