3972147236 has 12 divisors (see below), whose sum is σ = 6958126812. Its totient is φ = 1984111008.

The previous prime is 3972147233. The next prime is 3972147253. The reversal of 3972147236 is 6327412793.

It can be written as a sum of positive squares in 2 ways, for example, as 527161600 + 3444985636 = 22960^2 + 58694^2 .

It is not an unprimeable number, because it can be changed into a prime (3972147233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486095 + ... + 494198.

It is an arithmetic number, because the mean of its divisors is an integer number (579843901).

Almost surely, 2^3972147236 is an apocalyptic number.

It is an amenable number.

3972147236 is a deficient number, since it is larger than the sum of its proper divisors (2985979576).

3972147236 is a wasteful number, since it uses less digits than its factorization.

3972147236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981310 (or 981308 counting only the distinct ones).

The product of its digits is 381024, while the sum is 44.

The square root of 3972147236 is about 63024.9731138380. The cubic root of 3972147236 is about 1583.7080079616.

The spelling of 3972147236 in words is "three billion, nine hundred seventy-two million, one hundred forty-seven thousand, two hundred thirty-six".