28225658 has 8 divisors (see below), whose sum is σ = 42402528. Its totient is φ = 14091484.

The previous prime is 28225649. The next prime is 28225663. The reversal of 28225658 is 85652282.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8966 + ... + 11697.

It is an arithmetic number, because the mean of its divisors is an integer number (5300316).

Almost surely, 2^28225658 is an apocalyptic number.

28225658 is a deficient number, since it is larger than the sum of its proper divisors (14176870).

28225658 is a wasteful number, since it uses less digits than its factorization.

28225658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21348.

The product of its digits is 76800, while the sum is 38.

The square root of 28225658 is about 5312.7825101353. The cubic root of 28225658 is about 304.4724662178.

The spelling of 28225658 in words is "twenty-eight million, two hundred twenty-five thousand, six hundred fifty-eight".