28585137 has 8 divisors (see below), whose sum is σ = 43558336. Its totient is φ = 16334352.

The previous prime is 28585111. The next prime is 28585163. The reversal of 28585137 is 73158582.

It is an interprime number because it is at equal distance from previous prime (28585111) and next prime (28585163).

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

It is not a de Polignac number, because 28585137 - 2¹⁵ = 28552369 is a prime.

It is a super-2 number, since 2×28585137² = 1634220114617538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28585095 and 28585104.

It is not an unprimeable number, because it can be changed into a prime (28585237) 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, 680578 + ... + 680619.

It is an arithmetic number, because the mean of its divisors is an integer number (5444792).

Almost surely, 2^28585137 is an apocalyptic number.

It is an amenable number.

28585137 is a deficient number, since it is larger than the sum of its proper divisors (14973199).

28585137 is a wasteful number, since it uses less digits than its factorization.

28585137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361207.

The product of its digits is 67200, while the sum is 39.

The square root of 28585137 is about 5346.5069905500. The cubic root of 28585137 is about 305.7595937386.

The spelling of 28585137 in words is "twenty-eight million, five hundred eighty-five thousand, one hundred thirty-seven".