28220046 has 8 divisors (see below), whose sum is σ = 56440104. Its totient is φ = 9406680.

The previous prime is 28220041. The next prime is 28220081. The reversal of 28220046 is 64002282.

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

28220046 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28219998 and 28220025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28220041) 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, 2351665 + ... + 2351676.

It is an arithmetic number, because the mean of its divisors is an integer number (7055013).

Almost surely, 2^28220046 is an apocalyptic number.

28220046 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28220046 is a wasteful number, since it uses less digits than its factorization.

28220046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4703346.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 28220046 is about 5312.2543237311. The cubic root of 28220046 is about 304.4522858469.

The spelling of 28220046 in words is "twenty-eight million, two hundred twenty thousand, forty-six".