28656590 has 8 divisors (see below), whose sum is σ = 51581880. Its totient is φ = 11462632.

The previous prime is 28656571. The next prime is 28656599. The reversal of 28656590 is 9565682.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28656599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1432820 + ... + 1432839.

It is an arithmetic number, because the mean of its divisors is an integer number (6447735).

Almost surely, 2^28656590 is an apocalyptic number.

28656590 is a deficient number, since it is larger than the sum of its proper divisors (22925290).

28656590 is a wasteful number, since it uses less digits than its factorization.

28656590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865666.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 28656590 is about 5353.1850332302. The cubic root of 28656590 is about 306.0141463265.

The spelling of 28656590 in words is "twenty-eight million, six hundred fifty-six thousand, five hundred ninety".