28980037 has 4 divisors (see below), whose sum is σ = 28997100. Its totient is φ = 28962976.

The previous prime is 28980013. The next prime is 28980047. The reversal of 28980037 is 73008982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22982436 + 5997601 = 4794^2 + 2449^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28980037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28979978 and 28980005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28980047) 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 3 ways as a sum of consecutive naturals, for example, 5662 + ... + 9487.

It is an arithmetic number, because the mean of its divisors is an integer number (7249275).

Almost surely, 2^28980037 is an apocalyptic number.

It is an amenable number.

28980037 is a deficient number, since it is larger than the sum of its proper divisors (17063).

28980037 is a wasteful number, since it uses less digits than its factorization.

28980037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17062.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 28980037 is about 5383.3109700258. The cubic root of 28980037 is about 307.1611690748.

The spelling of 28980037 in words is "twenty-eight million, nine hundred eighty thousand, thirty-seven".