1928140379 has 4 divisors (see below), whose sum is σ = 2103425880. Its totient is φ = 1752854880.

The previous prime is 1928140369. The next prime is 1928140433. The reversal of 1928140379 is 9730418291.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1928140379 - 2⁴ = 1928140363 is a prime.

It is a super-2 number, since 2×1928140379² = 7435450642260527282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1928140369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87642734 + ... + 87642755.

It is an arithmetic number, because the mean of its divisors is an integer number (525856470).

Almost surely, 2^1928140379 is an apocalyptic number.

1928140379 is a deficient number, since it is larger than the sum of its proper divisors (175285501).

1928140379 is a wasteful number, since it uses less digits than its factorization.

1928140379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175285500.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 1928140379 is about 43910.5952931636. The cubic root of 1928140379 is about 1244.6470570431.

The spelling of 1928140379 in words is "one billion, nine hundred twenty-eight million, one hundred forty thousand, three hundred seventy-nine".