28716945 has 16 divisors (see below), whose sum is σ = 46015872. Its totient is φ = 15292800.

The previous prime is 28716913. The next prime is 28716971. The reversal of 28716945 is 54961782.

It is not a de Polignac number, because 28716945 - 2⁵ = 28716913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28716897 and 28716906.

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, 15045 + ... + 16845.

It is an arithmetic number, because the mean of its divisors is an integer number (2875992).

Almost surely, 2^28716945 is an apocalyptic number.

It is an amenable number.

28716945 is a deficient number, since it is larger than the sum of its proper divisors (17298927).

28716945 is a wasteful number, since it uses less digits than its factorization.

28716945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2872.

The product of its digits is 120960, while the sum is 42.

The square root of 28716945 is about 5358.8193662410. The cubic root of 28716945 is about 306.2288326339.

The spelling of 28716945 in words is "twenty-eight million, seven hundred sixteen thousand, nine hundred forty-five".