28220942 has 8 divisors (see below), whose sum is σ = 42356736. Its totient is φ = 14102032.

The previous prime is 28220917. The next prime is 28220953. The reversal of 28220942 is 24902282.

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

It is a congruent number.

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, 1523 + ... + 7665.

It is an arithmetic number, because the mean of its divisors is an integer number (5294592).

Almost surely, 2^28220942 is an apocalyptic number.

28220942 is a deficient number, since it is larger than the sum of its proper divisors (14135794).

28220942 is a wasteful number, since it uses less digits than its factorization.

28220942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8442.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28220942 is about 5312.3386563735. The cubic root of 28220942 is about 304.4555079815.

The spelling of 28220942 in words is "twenty-eight million, two hundred twenty thousand, nine hundred forty-two".