1928728506 has 32 divisors (see below), whose sum is σ = 4089925440. Its totient is φ = 604267776.

The previous prime is 1928728469. The next prime is 1928728537. The reversal of 1928728506 is 6058278291.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64725 + ... + 89703.

It is an arithmetic number, because the mean of its divisors is an integer number (127810170).

Almost surely, 2^1928728506 is an apocalyptic number.

1928728506 is an abundant number, since it is smaller than the sum of its proper divisors (2161196934).

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

1928728506 is a wasteful number, since it uses less digits than its factorization.

1928728506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25758.

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 1928728506 is about 43917.2916514669. The cubic root of 1928728506 is about 1244.7735928033.

The spelling of 1928728506 in words is "one billion, nine hundred twenty-eight million, seven hundred twenty-eight thousand, five hundred six".