28730745 has 24 divisors (see below), whose sum is σ = 49959936. Its totient is φ = 15273888.

The previous prime is 28730729. The next prime is 28730761. The reversal of 28730745 is 54703782.

It is an interprime number because it is at equal distance from previous prime (28730729) and next prime (28730761).

It is not a de Polignac number, because 28730745 - 2⁴ = 28730729 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16402 + ... + 18068.

It is an arithmetic number, because the mean of its divisors is an integer number (2081664).

Almost surely, 2^28730745 is an apocalyptic number.

It is an amenable number.

28730745 is a deficient number, since it is larger than the sum of its proper divisors (21229191).

28730745 is a wasteful number, since it uses less digits than its factorization.

28730745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2058 counting only the distinct ones).

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

The square root of 28730745 is about 5360.1068086373. The cubic root of 28730745 is about 306.2778777899.

The spelling of 28730745 in words is "twenty-eight million, seven hundred thirty thousand, seven hundred forty-five".