3958721910 has 360 divisors, whose sum is σ = 12722482080. Its totient is φ = 882161280.

The previous prime is 3958721903. The next prime is 3958721911. The reversal of 3958721910 is 191278593.

3958721910 is a `hidden beast` number, since 39 + 587 + 21 + 9 + 10 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3958721911) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 16563571 + ... + 16563809.

It is an arithmetic number, because the mean of its divisors is an integer number (35340228).

Almost surely, 2^3958721910 is an apocalyptic number.

3958721910 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 3958721910, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6361241040).

3958721910 is an abundant number, since it is smaller than the sum of its proper divisors (8763760170).

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

3958721910 is a wasteful number, since it uses less digits than its factorization.

3958721910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 273 counting only the distinct ones).

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

The square root of 3958721910 is about 62918.3749790155. The cubic root of 3958721910 is about 1581.9217536496.

The spelling of 3958721910 in words is "three billion, nine hundred fifty-eight million, seven hundred twenty-one thousand, nine hundred ten".