1928997 has 24 divisors (see below), whose sum is σ = 3238976. Its totient is φ = 1083456.

The previous prime is 1928989. The next prime is 1929043. The reversal of 1928997 is 7998291.

It is not a de Polignac number, because 1928997 - 2³ = 1928989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3993 + ... + 4449.

2^1928997 is an apocalyptic number.

It is an amenable number.

1928997 is a deficient number, since it is larger than the sum of its proper divisors (1309979).

1928997 is a wasteful number, since it uses less digits than its factorization.

1928997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537 (or 534 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 1928997 is about 1388.8833644335. The cubic root of 1928997 is about 124.4831350843.

The spelling of 1928997 in words is "one million, nine hundred twenty-eight thousand, nine hundred ninety-seven".