28115037 has 6 divisors (see below), whose sum is σ = 40610622. Its totient is φ = 18743352.

The previous prime is 28115023. The next prime is 28115051. The reversal of 28115037 is 73051182.

It is an interprime number because it is at equal distance from previous prime (28115023) and next prime (28115051).

It can be written as a sum of positive squares in only one way, i.e., 21427641 + 6687396 = 4629^2 + 2586^2 .

It is not a de Polignac number, because 28115037 - 2⁷ = 28114909 is a prime.

It is a super-2 number, since 2×28115037² = 1580910611022738, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28115037.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28115137) 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 5 ways as a sum of consecutive naturals, for example, 1561938 + ... + 1561955.

It is an arithmetic number, because the mean of its divisors is an integer number (6768437).

Almost surely, 2^28115037 is an apocalyptic number.

It is an amenable number.

28115037 is a deficient number, since it is larger than the sum of its proper divisors (12495585).

28115037 is a wasteful number, since it uses less digits than its factorization.

28115037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3123899 (or 3123896 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 28115037 is about 5302.3614550500. The cubic root of 28115037 is about 304.0741862171.

The spelling of 28115037 in words is "twenty-eight million, one hundred fifteen thousand, thirty-seven".