72728141 has 4 divisors (see below), whose sum is σ = 72788832. Its totient is φ = 72667452.

The previous prime is 72728101. The next prime is 72728147. The reversal of 72728141 is 14182727.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14182727 = 13 ⋅1090979.

It is a cyclic number.

It is not a de Polignac number, because 72728141 - 2¹⁴ = 72711757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72728098 and 72728107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72728147) 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, 28511 + ... + 30956.

It is an arithmetic number, because the mean of its divisors is an integer number (18197208).

Almost surely, 2^72728141 is an apocalyptic number.

It is an amenable number.

72728141 is a deficient number, since it is larger than the sum of its proper divisors (60691).

72728141 is a wasteful number, since it uses less digits than its factorization.

72728141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60690.

The product of its digits is 6272, while the sum is 32.

The square root of 72728141 is about 8528.0795610735. The cubic root of 72728141 is about 417.4144656071.

The spelling of 72728141 in words is "seventy-two million, seven hundred twenty-eight thousand, one hundred forty-one".