28641719 has 8 divisors (see below), whose sum is σ = 30443328. Its totient is φ = 26853120.

The previous prime is 28641649. The next prime is 28641731. The reversal of 28641719 is 91714682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28641719 - 2¹⁶ = 28576183 is a prime.

It is a super-2 number, since 2×28641719² = 1640696134549922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28641419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1499 + ... + 7715.

It is an arithmetic number, because the mean of its divisors is an integer number (3805416).

Almost surely, 2^28641719 is an apocalyptic number.

28641719 is a deficient number, since it is larger than the sum of its proper divisors (1801609).

28641719 is a wasteful number, since it uses less digits than its factorization.

28641719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505.

The product of its digits is 24192, while the sum is 38.

The square root of 28641719 is about 5351.7958668096. The cubic root of 28641719 is about 305.9612030212.

The spelling of 28641719 in words is "twenty-eight million, six hundred forty-one thousand, seven hundred nineteen".