28941591 has 16 divisors (see below), whose sum is σ = 44183808. Its totient is φ = 16507200.

The previous prime is 28941589. The next prime is 28941593. The reversal of 28941591 is 19514982.

It is an interprime number because it is at equal distance from previous prime (28941589) and next prime (28941593).

It is not a de Polignac number, because 28941591 - 2¹ = 28941589 is a prime.

It is a super-2 number, since 2×28941591² = 1675231379222562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28941593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15076 + ... + 16886.

It is an arithmetic number, because the mean of its divisors is an integer number (2761488).

Almost surely, 2^28941591 is an apocalyptic number.

28941591 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28941591 is a deficient number, since it is larger than the sum of its proper divisors (15242217).

28941591 is a wasteful number, since it uses less digits than its factorization.

28941591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582.

The product of its digits is 25920, while the sum is 39.

The square root of 28941591 is about 5379.7389341863. The cubic root of 28941591 is about 307.0252784697.

The spelling of 28941591 in words is "twenty-eight million, nine hundred forty-one thousand, five hundred ninety-one".