28100022 has 8 divisors (see below), whose sum is σ = 56200056. Its totient is φ = 9366672.

The previous prime is 28100011. The next prime is 28100041. The reversal of 28100022 is 22000182.

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

28100022 is an admirable number.

It is a super-2 number, since 2×28100022² = 1579222472800968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28099974 and 28100010.

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, 2341663 + ... + 2341674.

It is an arithmetic number, because the mean of its divisors is an integer number (7025007).

Almost surely, 2^28100022 is an apocalyptic number.

28100022 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.

28100022 is a wasteful number, since it uses less digits than its factorization.

28100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4683342.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 28100022 is about 5300.9453873814. The cubic root of 28100022 is about 304.0200457119.

The spelling of 28100022 in words is "twenty-eight million, one hundred thousand, twenty-two".