3728320043 has 4 divisors (see below), whose sum is σ = 4260937200. Its totient is φ = 3195702888.

The previous prime is 3728320009. The next prime is 3728320067. The reversal of 3728320043 is 3400238273.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3400238273 = 17839 ⋅190607.

It is not a de Polignac number, because 3728320043 - 2¹⁰ = 3728319019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3728319991 and 3728320009.

It is not an unprimeable number, because it can be changed into a prime (3728320943) 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, 266308568 + ... + 266308581.

It is an arithmetic number, because the mean of its divisors is an integer number (1065234300).

Almost surely, 2^3728320043 is an apocalyptic number.

3728320043 is a deficient number, since it is larger than the sum of its proper divisors (532617157).

3728320043 is an equidigital number, since it uses as much as digits as its factorization.

3728320043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532617156.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 3728320043 is about 61059.9708729049. The cubic root of 3728320043 is about 1550.6164794378.

The spelling of 3728320043 in words is "three billion, seven hundred twenty-eight million, three hundred twenty thousand, forty-three".