72550389 has 8 divisors (see below), whose sum is σ = 96894112. Its totient is φ = 48286800.

The previous prime is 72550369. The next prime is 72550403. The reversal of 72550389 is 98305527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72550389 - 2⁹ = 72549877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72550319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17887 + ... + 21564.

It is an arithmetic number, because the mean of its divisors is an integer number (12111764).

Almost surely, 2^72550389 is an apocalyptic number.

It is an amenable number.

72550389 is a deficient number, since it is larger than the sum of its proper divisors (24343723).

72550389 is a wasteful number, since it uses less digits than its factorization.

72550389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40067.

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 72550389 is about 8517.6516129741. The cubic root of 72550389 is about 417.0741260723.

The spelling of 72550389 in words is "seventy-two million, five hundred fifty thousand, three hundred eighty-nine".