3972147220 has 24 divisors (see below), whose sum is σ = 8780536800. Its totient is φ = 1505234592.

The previous prime is 3972147217. The next prime is 3972147233. The reversal of 3972147220 is 227412793.

It is a self number, because there is not a number n which added to its sum of digits gives 3972147220.

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, 5226130 + ... + 5226889.

It is an arithmetic number, because the mean of its divisors is an integer number (365855700).

Almost surely, 2^3972147220 is an apocalyptic number.

It is an amenable number.

3972147220 is an abundant number, since it is smaller than the sum of its proper divisors (4808389580).

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

3972147220 is a wasteful number, since it uses less digits than its factorization.

3972147220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453047 (or 10453045 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 3972147220 is about 63024.9729869042. The cubic root of 3972147220 is about 1583.7080058352.

The spelling of 3972147220 in words is "three billion, nine hundred seventy-two million, one hundred forty-seven thousand, two hundred twenty".