28615141 has 4 divisors (see below), whose sum is σ = 29601900. Its totient is φ = 27628384.

The previous prime is 28615127. The next prime is 28615157. The reversal of 28615141 is 14151682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14151682 = 2 ⋅7075841.

It can be written as a sum of positive squares in 2 ways, for example, as 19936225 + 8678916 = 4465^2 + 2946^2 .

It is a cyclic number.

It is not a de Polignac number, because 28615141 - 2⁵ = 28615109 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 (28616141) 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, 493336 + ... + 493393.

It is an arithmetic number, because the mean of its divisors is an integer number (7400475).

Almost surely, 2^28615141 is an apocalyptic number.

It is an amenable number.

28615141 is a deficient number, since it is larger than the sum of its proper divisors (986759).

28615141 is an equidigital number, since it uses as much as digits as its factorization.

28615141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986758.

The product of its digits is 1920, while the sum is 28.

The square root of 28615141 is about 5349.3121987785. The cubic root of 28615141 is about 305.8665351295.

The spelling of 28615141 in words is "twenty-eight million, six hundred fifteen thousand, one hundred forty-one".