1928213444 has 6 divisors (see below), whose sum is σ = 3374373534. Its totient is φ = 964106720.

The previous prime is 1928213437. The next prime is 1928213467. The reversal of 1928213444 is 4443128291.

It can be written as a sum of positive squares in only one way, i.e., 1197160000 + 731053444 = 34600^2 + 27038^2 .

It is a super-3 number, since 3×1928213444³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 1928213398 and 1928213407.

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 as a sum of consecutive naturals, namely, 241026677 + ... + 241026684.

It is an arithmetic number, because the mean of its divisors is an integer number (562395589).

Almost surely, 2^1928213444 is an apocalyptic number.

It is an amenable number.

1928213444 is a deficient number, since it is larger than the sum of its proper divisors (1446160090).

1928213444 is a wasteful number, since it uses less digits than its factorization.

1928213444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482053365 (or 482053363 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 1928213444 is about 43911.4272598830. The cubic root of 1928213444 is about 1244.6627784068.

The spelling of 1928213444 in words is "one billion, nine hundred twenty-eight million, two hundred thirteen thousand, four hundred forty-four".