72578027 has 4 divisors (see below), whose sum is σ = 72635880. Its totient is φ = 72520176.

The previous prime is 72578021. The next prime is 72578057. The reversal of 72578027 is 72087527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72087527 = 1721 ⋅41887.

It is a cyclic number.

It is not a de Polignac number, because 72578027 - 2⁶ = 72577963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72578021) 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, 27002 + ... + 29567.

It is an arithmetic number, because the mean of its divisors is an integer number (18158970).

Almost surely, 2^72578027 is an apocalyptic number.

72578027 is a deficient number, since it is larger than the sum of its proper divisors (57853).

72578027 is a wasteful number, since it uses less digits than its factorization.

72578027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57852.

The product of its (nonzero) digits is 54880, while the sum is 38.

The square root of 72578027 is about 8519.2738540324. The cubic root of 72578027 is about 417.1270806758.

The spelling of 72578027 in words is "seventy-two million, five hundred seventy-eight thousand, twenty-seven".