28507045 has 16 divisors (see below), whose sum is σ = 41395968. Its totient is φ = 18397440.

The previous prime is 28507033. The next prime is 28507109. The reversal of 28507045 is 54070582.

It is not a de Polignac number, because 28507045 - 2⁷ = 28506917 is a prime.

It is a super-2 number, since 2×28507045² = 1625303229264050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28506998 and 28507016.

It is a congruent number.

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, 23361 + ... + 24550.

It is an arithmetic number, because the mean of its divisors is an integer number (2587248).

Almost surely, 2^28507045 is an apocalyptic number.

It is an amenable number.

28507045 is a deficient number, since it is larger than the sum of its proper divisors (12888923).

28507045 is a wasteful number, since it uses less digits than its factorization.

28507045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47940.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28507045 is about 5339.1989099489. The cubic root of 28507045 is about 305.4809039791.

The spelling of 28507045 in words is "twenty-eight million, five hundred seven thousand, forty-five".