28973673 has 8 divisors (see below), whose sum is σ = 42924000. Its totient is φ = 19315764.

The previous prime is 28973671. The next prime is 28973699. The reversal of 28973673 is 37637982.

It is a happy number.

28973673 is a `hidden beast` number, since 289 + 7 + 367 + 3 = 666.

It is not a de Polignac number, because 28973673 - 2¹ = 28973671 is a prime.

It is a super-2 number, since 2×28973673² = 1678947454221858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28973671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536523 + ... + 536576.

It is an arithmetic number, because the mean of its divisors is an integer number (5365500).

Almost surely, 2^28973673 is an apocalyptic number.

It is an amenable number.

28973673 is a deficient number, since it is larger than the sum of its proper divisors (13950327).

28973673 is a wasteful number, since it uses less digits than its factorization.

28973673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073108 (or 1073102 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 28973673 is about 5382.7198515249. The cubic root of 28973673 is about 307.1386832882.

It can be divided in two parts, 28973 and 673, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28973673 in words is "twenty-eight million, nine hundred seventy-three thousand, six hundred seventy-three".