1928797272 has 80 divisors (see below), whose sum is σ = 5548498560. Its totient is φ = 625548096.

The previous prime is 1928797249. The next prime is 1928797307. The reversal of 1928797272 is 2727978291.

It is a happy number.

1928797272 is a `hidden beast` number, since 1 + 9 + 287 + 97 + 272 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16248 + ... + 64199.

It is an arithmetic number, because the mean of its divisors is an integer number (69356232).

Almost surely, 2^1928797272 is an apocalyptic number.

1928797272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1928797272 is an abundant number, since it is smaller than the sum of its proper divisors (3619701288).

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

1928797272 is a wasteful number, since it uses less digits than its factorization.

1928797272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80502 (or 80489 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 1928797272 is about 43918.0745479580. The cubic root of 1928797272 is about 1244.7883861561.

The spelling of 1928797272 in words is "one billion, nine hundred twenty-eight million, seven hundred ninety-seven thousand, two hundred seventy-two".