28528737 has 16 divisors (see below), whose sum is σ = 41215680. Its totient is φ = 17482752.

The previous prime is 28528733. The next prime is 28528741. The reversal of 28528737 is 73782582.

It is an interprime number because it is at equal distance from previous prime (28528733) and next prime (28528741).

It is not a de Polignac number, because 28528737 - 2² = 28528733 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28528733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4312 + ... + 8697.

It is an arithmetic number, because the mean of its divisors is an integer number (2575980).

Almost surely, 2^28528737 is an apocalyptic number.

It is an amenable number.

28528737 is a deficient number, since it is larger than the sum of its proper divisors (12686943).

28528737 is a wasteful number, since it uses less digits than its factorization.

28528737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13072.

The product of its digits is 188160, while the sum is 42.

The square root of 28528737 is about 5341.2299145422. The cubic root of 28528737 is about 305.5583680084.

The spelling of 28528737 in words is "twenty-eight million, five hundred twenty-eight thousand, seven hundred thirty-seven".