28973651 has 12 divisors (see below), whose sum is σ = 35479080. Its totient is φ = 23526720.

The previous prime is 28973621. The next prime is 28973657. The reversal of 28973651 is 15637982.

It is not a de Polignac number, because 28973651 - 2⁶ = 28973587 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28973599 and 28973608.

It is not an unprimeable number, because it can be changed into a prime (28973657) 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 11 ways as a sum of consecutive naturals, for example, 14630 + ... + 16491.

It is an arithmetic number, because the mean of its divisors is an integer number (2956590).

Almost surely, 2^28973651 is an apocalyptic number.

28973651 is a deficient number, since it is larger than the sum of its proper divisors (6505429).

28973651 is a wasteful number, since it uses less digits than its factorization.

28973651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31154 (or 31147 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 28973651 is about 5382.7178079480. The cubic root of 28973651 is about 307.1386055504.

The spelling of 28973651 in words is "twenty-eight million, nine hundred seventy-three thousand, six hundred fifty-one".