19473228 has 72 divisors (see below), whose sum is σ = 53307072. Its totient is φ = 5970432.

The previous prime is 19473221. The next prime is 19473269. The reversal of 19473228 is 82237491.

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 = 19473192 and 19473201.

It is not an unprimeable number, because it can be changed into a prime (19473221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28426 + ... + 29102.

It is an arithmetic number, because the mean of its divisors is an integer number (740376).

It is a vampire number, since it can be written as 2397 ⋅ 8124 (with its own digits).

Almost surely, 2^19473228 is an apocalyptic number.

19473228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19473228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26653536).

19473228 is an abundant number, since it is smaller than the sum of its proper divisors (33833844).

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

19473228 is a wasteful number, since it uses less digits than its factorization.

19473228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 746 counting only the distinct ones).

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

The square root of 19473228 is about 4412.8480599268. The cubic root of 19473228 is about 269.0373952425.

It can be divided in two parts, 19473 and 228, that added together give a triangular number (19701 = T₁₉₈).

The spelling of 19473228 in words is "nineteen million, four hundred seventy-three thousand, two hundred twenty-eight".