1922731728 has 20 divisors (see below), whose sum is σ = 4967057088. Its totient is φ = 640910560.

The previous prime is 1922731711. The next prime is 1922731729. The reversal of 1922731728 is 8271372291.

It is a self number, because there is not a number n which added to its sum of digits gives 1922731728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1922731729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20028408 + ... + 20028503.

Almost surely, 2^1922731728 is an apocalyptic number.

It is an amenable number.

1922731728 is an abundant number, since it is smaller than the sum of its proper divisors (3044325360).

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

1922731728 is a wasteful number, since it uses less digits than its factorization.

1922731728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40056922 (or 40056916 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 1922731728 is about 43848.9649592781. The cubic root of 1922731728 is about 1243.4821754134.

The spelling of 1922731728 in words is "one billion, nine hundred twenty-two million, seven hundred thirty-one thousand, seven hundred twenty-eight".