1941172728 has 128 divisors (see below), whose sum is σ = 5379747840. Its totient is φ = 578816000.

The previous prime is 1941172661. The next prime is 1941172771. The reversal of 1941172728 is 8272711491.

It is a self number, because there is not a number n which added to its sum of digits gives 1941172728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6907948 + ... + 6908228.

It is an arithmetic number, because the mean of its divisors is an integer number (42029280).

Almost surely, 2^1941172728 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 1941172728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2689873920).

1941172728 is an abundant number, since it is smaller than the sum of its proper divisors (3438575112).

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

1941172728 is a wasteful number, since it uses less digits than its factorization.

1941172728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 625 counting only the distinct ones).

The product of its digits is 56448, while the sum is 42.

The square root of 1941172728 is about 44058.7417886621. The cubic root of 1941172728 is about 1247.4449629603. Note that the first 3 decimals are identical.

The spelling of 1941172728 in words is "one billion, nine hundred forty-one million, one hundred seventy-two thousand, seven hundred twenty-eight".