3949242720 has 192 divisors, whose sum is σ = 13178350080. Its totient is φ = 991346688.

The previous prime is 3949242709. The next prime is 3949242779. The reversal of 3949242720 is 272429493.

It is a super-2 number, since 2×3949242720² = 31193036122945996800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1521744 + ... + 1524336.

It is an arithmetic number, because the mean of its divisors is an integer number (68637240).

Almost surely, 2^3949242720 is an apocalyptic number.

3949242720 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 3949242720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6589175040).

3949242720 is an abundant number, since it is smaller than the sum of its proper divisors (9229107360).

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

3949242720 is a wasteful number, since it uses less digits than its factorization.

3949242720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2797 (or 2789 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 3949242720 is about 62843.0005648998. Note that the first 3 decimals coincide. The cubic root of 3949242720 is about 1580.6581032449.

The spelling of 3949242720 in words is "three billion, nine hundred forty-nine million, two hundred forty-two thousand, seven hundred twenty".