19885228 has 12 divisors (see below), whose sum is σ = 37962792. Its totient is φ = 9038720.

The previous prime is 19885219. The next prime is 19885231. The reversal of 19885228 is 82258891.

It is a super-2 number, since 2×19885228² = 790844585223968, which contains 22 as substring.

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, 225925 + ... + 226012.

It is an arithmetic number, because the mean of its divisors is an integer number (3163566).

Almost surely, 2^19885228 is an apocalyptic number.

It is an amenable number.

19885228 is a deficient number, since it is larger than the sum of its proper divisors (18077564).

19885228 is a wasteful number, since it uses less digits than its factorization.

19885228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451952 (or 451950 counting only the distinct ones).

The product of its digits is 92160, while the sum is 43.

The square root of 19885228 is about 4459.2855930070. The cubic root of 19885228 is about 270.9215333616.

The spelling of 19885228 in words is "nineteen million, eight hundred eighty-five thousand, two hundred twenty-eight".