72028135 has 4 divisors (see below), whose sum is σ = 86433768. Its totient is φ = 57622504.

The previous prime is 72028093. The next prime is 72028153. The reversal of 72028135 is 53182027.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53182027 = 29 ⋅1833863.

It is a cyclic number.

It is not a de Polignac number, because 72028135 - 2¹⁹ = 71503847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7202809 + ... + 7202818.

It is an arithmetic number, because the mean of its divisors is an integer number (21608442).

Almost surely, 2^72028135 is an apocalyptic number.

72028135 is a deficient number, since it is larger than the sum of its proper divisors (14405633).

72028135 is a wasteful number, since it uses less digits than its factorization.

72028135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14405632.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 72028135 is about 8486.9390830853. The cubic root of 72028135 is about 416.0709456633.

The spelling of 72028135 in words is "seventy-two million, twenty-eight thousand, one hundred thirty-five".