28741919 has 4 divisors (see below), whose sum is σ = 29213160. Its totient is φ = 28270680.

The previous prime is 28741913. The next prime is 28741981. The reversal of 28741919 is 91914782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91914782 = 2 ⋅45957391.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28741919 is a prime.

It is a super-2 number, since 2×28741919² = 1652195815605122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28741913) 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, 235529 + ... + 235650.

It is an arithmetic number, because the mean of its divisors is an integer number (7303290).

Almost surely, 2^28741919 is an apocalyptic number.

28741919 is a deficient number, since it is larger than the sum of its proper divisors (471241).

28741919 is an equidigital number, since it uses as much as digits as its factorization.

28741919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471240.

The product of its digits is 36288, while the sum is 41.

The square root of 28741919 is about 5361.1490372867. The cubic root of 28741919 is about 306.3175786449.

The spelling of 28741919 in words is "twenty-eight million, seven hundred forty-one thousand, nine hundred nineteen".