19734228 has 36 divisors (see below), whose sum is σ = 51495808. Its totient is φ = 6365520.

The previous prime is 19734227. The next prime is 19734241. The reversal of 19734228 is 82243791.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 19734192 and 19734201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19734227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7726 + ... + 9957.

Almost surely, 2^19734228 is an apocalyptic number.

19734228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

19734228 is an abundant number, since it is smaller than the sum of its proper divisors (31761580).

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

19734228 is a wasteful number, since it uses less digits than its factorization.

19734228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17724 (or 17719 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 19734228 is about 4442.3223656101. The cubic root of 19734228 is about 270.2340357625.

The spelling of 19734228 in words is "nineteen million, seven hundred thirty-four thousand, two hundred twenty-eight".