3973397720 has 64 divisors (see below), whose sum is σ = 9245491200. Its totient is φ = 1535264640.

The previous prime is 3973397713. The next prime is 3973397749. The reversal of 3973397720 is 277933793.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 750041 + ... + 755319.

It is an arithmetic number, because the mean of its divisors is an integer number (144460800).

Almost surely, 2^3973397720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3973397720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4622745600).

3973397720 is an abundant number, since it is smaller than the sum of its proper divisors (5272093480).

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

3973397720 is a wasteful number, since it uses less digits than its factorization.

3973397720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5928 (or 5924 counting only the distinct ones).

The product of its (nonzero) digits is 1500282, while the sum is 50.

The square root of 3973397720 is about 63034.8928768821. The cubic root of 3973397720 is about 1583.8741812028.

The spelling of 3973397720 in words is "three billion, nine hundred seventy-three million, three hundred ninety-seven thousand, seven hundred twenty".