28577919 has 8 divisors (see below), whose sum is σ = 40109440. Its totient is φ = 18049176.

The previous prime is 28577911. The next prime is 28577933. The reversal of 28577919 is 91977582.

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

It is not a de Polignac number, because 28577919 - 2³ = 28577911 is a prime.

It is a super-2 number, since 2×28577919² = 1633394908741122, 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 (28577911) 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 7 ways as a sum of consecutive naturals, for example, 250627 + ... + 250740.

It is an arithmetic number, because the mean of its divisors is an integer number (5013680).

Almost surely, 2^28577919 is an apocalyptic number.

28577919 is a deficient number, since it is larger than the sum of its proper divisors (11531521).

28577919 is a wasteful number, since it uses less digits than its factorization.

28577919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501389.

The product of its digits is 317520, while the sum is 48.

The square root of 28577919 is about 5345.8319277733. The cubic root of 28577919 is about 305.7338559046.

The spelling of 28577919 in words is "twenty-eight million, five hundred seventy-seven thousand, nine hundred nineteen".