1428993 has 6 divisors (see below), whose sum is σ = 2064114. Its totient is φ = 952656.

The previous prime is 1428991. The next prime is 1428997. The reversal of 1428993 is 3998241.

It can be written as a sum of positive squares in only one way, i.e., 1140624 + 288369 = 1068^2 + 537^2 .

It is not a de Polignac number, because 1428993 - 2¹ = 1428991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1428991) 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, 79380 + ... + 79397.

It is an arithmetic number, because the mean of its divisors is an integer number (344019).

2^1428993 is an apocalyptic number.

It is an amenable number.

1428993 is a deficient number, since it is larger than the sum of its proper divisors (635121).

1428993 is a wasteful number, since it uses less digits than its factorization.

1428993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158783 (or 158780 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1428993 is about 1195.4049523070. The cubic root of 1428993 is about 112.6358654798.

The spelling of 1428993 in words is "one million, four hundred twenty-eight thousand, nine hundred ninety-three".