28059591 has 8 divisors (see below), whose sum is σ = 42757504. Its totient is φ = 16034040.

The previous prime is 28059589. The next prime is 28059593. The reversal of 28059591 is 19595082.

It is an interprime number because it is at equal distance from previous prime (28059589) and next prime (28059593).

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

It is not a de Polignac number, because 28059591 - 2¹ = 28059589 is a prime.

It is a super-3 number, since 3×28059591³ (a number of 23 digits) contains 333 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 (28059593) 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, 668065 + ... + 668106.

It is an arithmetic number, because the mean of its divisors is an integer number (5344688).

Almost surely, 2^28059591 is an apocalyptic number.

28059591 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28059591 is a deficient number, since it is larger than the sum of its proper divisors (14697913).

28059591 is a wasteful number, since it uses less digits than its factorization.

28059591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336181.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 28059591 is about 5297.1304495925. The cubic root of 28059591 is about 303.8741652276.

The spelling of 28059591 in words is "twenty-eight million, fifty-nine thousand, five hundred ninety-one".