28703745 has 48 divisors (see below), whose sum is σ = 57238272. Its totient is φ = 13034880.

The previous prime is 28703743. The next prime is 28703761. The reversal of 28703745 is 54730782.

28703745 is a `hidden beast` number, since 287 + 0 + 374 + 5 = 666.

It is not a de Polignac number, because 28703745 - 2¹ = 28703743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28703743) 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 47 ways as a sum of consecutive naturals, for example, 92140 + ... + 92450.

It is an arithmetic number, because the mean of its divisors is an integer number (1192464).

Almost surely, 2^28703745 is an apocalyptic number.

It is an amenable number.

28703745 is a deficient number, since it is larger than the sum of its proper divisors (28534527).

28703745 is a wasteful number, since it uses less digits than its factorization.

28703745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 28703745 is about 5357.5876101096. The cubic root of 28703745 is about 306.1819051712.

The spelling of 28703745 in words is "twenty-eight million, seven hundred three thousand, seven hundred forty-five".