1928213443 has 6 divisors (see below), whose sum is σ = 2087947284. Its totient is φ = 1779889176.

The previous prime is 1928213437. The next prime is 1928213467. The reversal of 1928213443 is 3443128291.

It is a de Polignac number, because none of the positive numbers 2^k-1928213443 is a prime.

It is a super-3 number, since 3×1928213443³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1928213473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5704605 + ... + 5704942.

It is an arithmetic number, because the mean of its divisors is an integer number (347991214).

Almost surely, 2^1928213443 is an apocalyptic number.

1928213443 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1928213443 is a deficient number, since it is larger than the sum of its proper divisors (159733841).

1928213443 is a wasteful number, since it uses less digits than its factorization.

1928213443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11409573 (or 11409560 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 1928213443 is about 43911.4272484965. The cubic root of 1928213443 is about 1244.6627781917.

The spelling of 1928213443 in words is "one billion, nine hundred twenty-eight million, two hundred thirteen thousand, four hundred forty-three".