1947728 has 40 divisors (see below), whose sum is σ = 4092000. Its totient is φ = 895104.

The previous prime is 1947719. The next prime is 1947731. The reversal of 1947728 is 8277491.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1947691 and 1947700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12998 + ... + 13146.

It is an arithmetic number, because the mean of its divisors is an integer number (102300).

2^1947728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1947728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2046000).

1947728 is an abundant number, since it is smaller than the sum of its proper divisors (2144272).

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

1947728 is a wasteful number, since it uses less digits than its factorization.

1947728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 213 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 1947728 is about 1395.6102607820. The cubic root of 1947728 is about 124.8847577865.

The spelling of 1947728 in words is "one million, nine hundred forty-seven thousand, seven hundred twenty-eight".