3961280724 has 24 divisors (see below), whose sum is σ = 9255449280. Its totient is φ = 1318646784.

The previous prime is 3961280699. The next prime is 3961280753. The reversal of 3961280724 is 4270821693.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213229 + ... + 231060.

It is an arithmetic number, because the mean of its divisors is an integer number (385643720).

Almost surely, 2^3961280724 is an apocalyptic number.

It is an amenable number.

3961280724 is an abundant number, since it is smaller than the sum of its proper divisors (5294168556).

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

3961280724 is a wasteful number, since it uses less digits than its factorization.

3961280724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445039 (or 445037 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 3961280724 is about 62938.7060877486. The cubic root of 3961280724 is about 1582.2625178150.

The spelling of 3961280724 in words is "three billion, nine hundred sixty-one million, two hundred eighty thousand, seven hundred twenty-four".