1928139 has 8 divisors (see below), whose sum is σ = 2706240. Its totient is φ = 1217736.

The previous prime is 1928099. The next prime is 1928141. The reversal of 1928139 is 9318291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1928139 - 2⁷ = 1928011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1928539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16857 + ... + 16970.

It is an arithmetic number, because the mean of its divisors is an integer number (338280).

2^1928139 is an apocalyptic number.

1928139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1928139 is a deficient number, since it is larger than the sum of its proper divisors (778101).

1928139 is a wasteful number, since it uses less digits than its factorization.

1928139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33849.

The product of its digits is 3888, while the sum is 33.

The square root of 1928139 is about 1388.5744488503. The cubic root of 1928139 is about 124.4646760320.

The spelling of 1928139 in words is "one million, nine hundred twenty-eight thousand, one hundred thirty-nine".