28785037 has 4 divisors (see below), whose sum is σ = 28935936. Its totient is φ = 28634140.

The previous prime is 28785013. The next prime is 28785073. The reversal of 28785037 is 73058782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28785037 - 2⁷ = 28784909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28785007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75163 + ... + 75544.

It is an arithmetic number, because the mean of its divisors is an integer number (7233984).

Almost surely, 2^28785037 is an apocalyptic number.

It is an amenable number.

28785037 is a deficient number, since it is larger than the sum of its proper divisors (150899).

28785037 is a wasteful number, since it uses less digits than its factorization.

28785037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150898.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28785037 is about 5365.1688696629. The cubic root of 28785037 is about 306.4706790946.

The spelling of 28785037 in words is "twenty-eight million, seven hundred eighty-five thousand, thirty-seven".