72381843 has 10 divisors (see below), whose sum is σ = 108126084. Its totient is φ = 48254508.

The previous prime is 72381821. The next prime is 72381847. The reversal of 72381843 is 34818327.

It is not a de Polignac number, because 72381843 - 2¹⁷ = 72250771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72381798 and 72381807.

It is not an unprimeable number, because it can be changed into a prime (72381847) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 446721 + ... + 446882.

Almost surely, 2^72381843 is an apocalyptic number.

72381843 is a deficient number, since it is larger than the sum of its proper divisors (35744241).

72381843 is an equidigital number, since it uses as much as digits as its factorization.

72381843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893615 (or 893606 counting only the distinct ones).

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

The square root of 72381843 is about 8507.7519357348. The cubic root of 72381843 is about 416.7508993083.

The spelling of 72381843 in words is "seventy-two million, three hundred eighty-one thousand, eight hundred forty-three".