28591101 has 24 divisors (see below), whose sum is σ = 51489984. Its totient is φ = 14852160.

The previous prime is 28591099. The next prime is 28591103. The reversal of 28591101 is 10119582.

It is an interprime number because it is at equal distance from previous prime (28591099) and next prime (28591103).

It is not a de Polignac number, because 28591101 - 2¹ = 28591099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28591103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19936 + ... + 21321.

It is an arithmetic number, because the mean of its divisors is an integer number (2145416).

Almost surely, 2^28591101 is an apocalyptic number.

28591101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28591101 is a deficient number, since it is larger than the sum of its proper divisors (22898883).

28591101 is a wasteful number, since it uses less digits than its factorization.

28591101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41281 (or 41278 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 28591101 is about 5347.0647087912. The cubic root of 28591101 is about 305.7808568098.

The spelling of 28591101 in words is "twenty-eight million, five hundred ninety-one thousand, one hundred one".