28061837 has 4 divisors (see below), whose sum is σ = 28168800. Its totient is φ = 27954876.

The previous prime is 28061833. The next prime is 28061881. The reversal of 28061837 is 73816082.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73816082 = 2 ⋅36908041.

It is a cyclic number.

It is not a de Polignac number, because 28061837 - 2² = 28061833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28061797 and 28061806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28061833) 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 3 ways as a sum of consecutive naturals, for example, 53087 + ... + 53612.

It is an arithmetic number, because the mean of its divisors is an integer number (7042200).

Almost surely, 2^28061837 is an apocalyptic number.

It is an amenable number.

28061837 is a deficient number, since it is larger than the sum of its proper divisors (106963).

28061837 is a wasteful number, since it uses less digits than its factorization.

28061837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106962.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28061837 is about 5297.3424469256. The cubic root of 28061837 is about 303.8822727723.

The spelling of 28061837 in words is "twenty-eight million, sixty-one thousand, eight hundred thirty-seven".