28275519 has 8 divisors (see below), whose sum is σ = 37972480. Its totient is φ = 18714456.

The previous prime is 28275509. The next prime is 28275521. The reversal of 28275519 is 91557282.

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

It is not a de Polignac number, because 28275519 - 2¹² = 28271423 is a prime.

It is a super-2 number, since 2×28275519² = 1599009949438722, 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 (28275509) 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, 33487 + ... + 34320.

It is an arithmetic number, because the mean of its divisors is an integer number (4746560).

Almost surely, 2^28275519 is an apocalyptic number.

28275519 is a deficient number, since it is larger than the sum of its proper divisors (9696961).

28275519 is a wasteful number, since it uses less digits than its factorization.

28275519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67949.

The product of its digits is 50400, while the sum is 39.

The square root of 28275519 is about 5317.4729900583. The cubic root of 28275519 is about 304.6516456376.

The spelling of 28275519 in words is "twenty-eight million, two hundred seventy-five thousand, five hundred nineteen".