28693145 has 16 divisors (see below), whose sum is σ = 37255680. Its totient is φ = 21088704.

The previous prime is 28693139. The next prime is 28693199. The reversal of 28693145 is 54139682.

It is a happy number.

It is not a de Polignac number, because 28693145 - 2⁶ = 28693081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28693099 and 28693108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14612 + ... + 16458.

It is an arithmetic number, because the mean of its divisors is an integer number (2328480).

Almost surely, 2^28693145 is an apocalyptic number.

It is an amenable number.

28693145 is a deficient number, since it is larger than the sum of its proper divisors (8562535).

28693145 is a wasteful number, since it uses less digits than its factorization.

28693145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104.

The product of its digits is 51840, while the sum is 38.

The square root of 28693145 is about 5356.5982675575. The cubic root of 28693145 is about 306.1442105801.

The spelling of 28693145 in words is "twenty-eight million, six hundred ninety-three thousand, one hundred forty-five".