28649141 has 4 divisors (see below), whose sum is σ = 28927392. Its totient is φ = 28370892.

The previous prime is 28649123. The next prime is 28649147. The reversal of 28649141 is 14194682.

It is a happy number.

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: 14194682 = 2 ⋅7097341.

It is a cyclic number.

It is not a de Polignac number, because 28649141 - 2¹⁰ = 28648117 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 (28649147) 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, 138971 + ... + 139176.

It is an arithmetic number, because the mean of its divisors is an integer number (7231848).

Almost surely, 2^28649141 is an apocalyptic number.

It is an amenable number.

28649141 is a deficient number, since it is larger than the sum of its proper divisors (278251).

28649141 is a wasteful number, since it uses less digits than its factorization.

28649141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278250.

The product of its digits is 13824, while the sum is 35.

The square root of 28649141 is about 5352.4892339920. The cubic root of 28649141 is about 305.9876289017.

The spelling of 28649141 in words is "twenty-eight million, six hundred forty-nine thousand, one hundred forty-one".