28580990 has 16 divisors (see below), whose sum is σ = 51565248. Its totient is φ = 11405856.

The previous prime is 28580987. The next prime is 28581011. The reversal of 28580990 is 9908582.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1544 + ... + 7716.

It is an arithmetic number, because the mean of its divisors is an integer number (3222828).

Almost surely, 2^28580990 is an apocalyptic number.

28580990 is a deficient number, since it is larger than the sum of its proper divisors (22984258).

28580990 is a wasteful number, since it uses less digits than its factorization.

28580990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6643.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 28580990 is about 5346.1191531802. The cubic root of 28580990 is about 305.7448069591.

The spelling of 28580990 in words is "twenty-eight million, five hundred eighty thousand, nine hundred ninety".