28394609049 has 35 divisors (see below), whose sum is σ = 43118239013. Its totient is φ = 18690122412.

The previous prime is 28394609029. The next prime is 28394609063. The reversal of 28394609049 is 94090649382.

The square root of 28394609049 is 168507.

It is a perfect power (a square), and thus also a powerful number.

28394609049 is a `hidden beast` number, since 28 + 3 + 9 + 4 + 609 + 0 + 4 + 9 = 666.

It is not a de Polignac number, because 28394609049 - 2²⁷ = 28260391321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28394608986 and 28394609004.

It is not an unprimeable number, because it can be changed into a prime (28394609029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 34 ways as a sum of consecutive naturals, for example, 359425392 + ... + 359425470.

Almost surely, 2^28394609049 is an apocalyptic number.

28394609049 is the 168507-th square number.

28394609049 is the 84254-th centered octagonal number.

It is an amenable number.

28394609049 is a deficient number, since it is larger than the sum of its proper divisors (14723629964).

28394609049 is an frugal number, since it uses more digits than its factorization.

28394609049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 28394609049 in words is "twenty-eight billion, three hundred ninety-four million, six hundred nine thousand, forty-nine".