819402 has 16 divisors (see below), whose sum is σ = 1683552. Its totient is φ = 265680.

The previous prime is 819391. The next prime is 819407. The reversal of 819402 is 204918.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (819407) by changing a digit.

819402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1624 + ... + 2067.

It is an arithmetic number, because the mean of its divisors is an integer number (105222).

2⁸¹⁹⁴⁰² is an apocalyptic number.

819402 is an abundant number, since it is smaller than the sum of its proper divisors (864150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

819402 is a wasteful number, since it uses less digits than its factorization.

819402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 819402 is about 905.2082633295. The cubic root of 819402 is about 93.5762577666.

It can be divided in two parts, 819 and 402, that added together give a palindrome (1221).

The spelling of 819402 in words is "eight hundred nineteen thousand, four hundred two".