8381972 has 6 divisors (see below), whose sum is σ = 14668458. Its totient is φ = 4190984.

The previous prime is 8381963. The next prime is 8381977. The reversal of 8381972 is 2791838.

It can be written as a sum of positive squares in only one way, i.e., 8317456 + 64516 = 2884^2 + 254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8381977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1047743 + ... + 1047750.

It is an arithmetic number, because the mean of its divisors is an integer number (2444743).

Almost surely, 2^8381972 is an apocalyptic number.

It is an amenable number.

8381972 is a deficient number, since it is larger than the sum of its proper divisors (6286486).

8381972 is a wasteful number, since it uses less digits than its factorization.

8381972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2095497 (or 2095495 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 8381972 is about 2895.1635532384. The cubic root of 8381972 is about 203.1337418565.

The spelling of 8381972 in words is "eight million, three hundred eighty-one thousand, nine hundred seventy-two".