28590987 has 8 divisors (see below), whose sum is σ = 38767680. Its totient is φ = 18737480.

The previous prime is 28590971. The next prime is 28590997. The reversal of 28590987 is 78909582.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28590987 - 2⁴ = 28590971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28590937) 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, 80589 + ... + 80942.

It is an arithmetic number, because the mean of its divisors is an integer number (4845960).

Almost surely, 2^28590987 is an apocalyptic number.

28590987 is a deficient number, since it is larger than the sum of its proper divisors (10176693).

28590987 is a wasteful number, since it uses less digits than its factorization.

28590987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161593.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 28590987 is about 5347.0540487263. The cubic root of 28590987 is about 305.7804504006.

The spelling of 28590987 in words is "twenty-eight million, five hundred ninety thousand, nine hundred eighty-seven".