28911673 has 16 divisors (see below), whose sum is σ = 35002240. Its totient is φ = 23328000.

The previous prime is 28911671. The next prime is 28911703. The reversal of 28911673 is 37611982.

It is a cyclic number.

It is not a de Polignac number, because 28911673 - 2¹ = 28911671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28911671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23473 + ... + 24673.

It is an arithmetic number, because the mean of its divisors is an integer number (2187640).

Almost surely, 2^28911673 is an apocalyptic number.

It is an amenable number.

28911673 is a deficient number, since it is larger than the sum of its proper divisors (6090567).

28911673 is a wasteful number, since it uses less digits than its factorization.

28911673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408.

The product of its digits is 18144, while the sum is 37.

The square root of 28911673 is about 5376.9575970059. The cubic root of 28911673 is about 306.9194475076.

It can be divided in two parts, 28911 and 673, that added together give a square (29584 = 172²).

The spelling of 28911673 in words is "twenty-eight million, nine hundred eleven thousand, six hundred seventy-three".