72826389 has 6 divisors (see below), whose sum is σ = 105193686. Its totient is φ = 48550920.

The previous prime is 72826363. The next prime is 72826417. The reversal of 72826389 is 98362827.

72826389 is a `hidden beast` number, since 7 + 2 + 8 + 2 + 638 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 54908100 + 17918289 = 7410^2 + 4233^2 .

It is not a de Polignac number, because 72826389 - 2⁹ = 72825877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72826309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4045902 + ... + 4045919.

It is an arithmetic number, because the mean of its divisors is an integer number (17532281).

Almost surely, 2^72826389 is an apocalyptic number.

It is an amenable number.

72826389 is a deficient number, since it is larger than the sum of its proper divisors (32367297).

72826389 is a wasteful number, since it uses less digits than its factorization.

72826389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8091827 (or 8091824 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 72826389 is about 8533.8378822192. The cubic root of 72826389 is about 417.6023419134.

The spelling of 72826389 in words is "seventy-two million, eight hundred twenty-six thousand, three hundred eighty-nine".