8320381272 has 96 divisors (see below), whose sum is σ = 25768622880. Its totient is φ = 2375861760.

The previous prime is 8320381241. The next prime is 8320381337. The reversal of 8320381272 is 2721830238.

It is a happy number.

8320381272 is a `hidden beast` number, since 8 + 3 + 2 + 0 + 381 + 272 = 666.

It is a super-2 number, since 2×8320381272² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1115668 + ... + 1123100.

It is an arithmetic number, because the mean of its divisors is an integer number (268423155).

Almost surely, 2^8320381272 is an apocalyptic number.

It is an amenable number.

8320381272 is an abundant number, since it is smaller than the sum of its proper divisors (17448241608).

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

8320381272 is a wasteful number, since it uses less digits than its factorization.

8320381272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9673 (or 9666 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 8320381272 is about 91216.1239693948. The cubic root of 8320381272 is about 2026.3497598368.

The spelling of 8320381272 in words is "eight billion, three hundred twenty million, three hundred eighty-one thousand, two hundred seventy-two".