1928211394 has 16 divisors (see below), whose sum is σ = 3026320128. Its totient is φ = 919667232.

The previous prime is 1928211379. The next prime is 1928211413. The reversal of 1928211394 is 4931128291.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 40227 + ... + 73990.

It is an arithmetic number, because the mean of its divisors is an integer number (189145008).

Almost surely, 2^1928211394 is an apocalyptic number.

1928211394 is a deficient number, since it is larger than the sum of its proper divisors (1098108734).

1928211394 is a wasteful number, since it uses less digits than its factorization.

1928211394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114609.

The product of its digits is 31104, while the sum is 40.

The square root of 1928211394 is about 43911.4039174336. The cubic root of 1928211394 is about 1244.6623373146.

The spelling of 1928211394 in words is "one billion, nine hundred twenty-eight million, two hundred eleven thousand, three hundred ninety-four".