813402 has 20 divisors (see below), whose sum is σ = 1822986. Its totient is φ = 271080.

The previous prime is 813401. The next prime is 813419. The reversal of 813402 is 204318.

It is a happy number.

813402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 531441 + 281961 = 729^2 + 531^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (813401) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2349 + ... + 2672.

2⁸¹³⁴⁰² is an apocalyptic number.

813402 is an abundant number, since it is smaller than the sum of its proper divisors (1009584).

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

813402 is a wasteful number, since it uses less digits than its factorization.

813402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5035 (or 5026 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 813402 is about 901.8880196565. Note that the first 3 decimals coincide. The cubic root of 813402 is about 93.3472966637.

The spelling of 813402 in words is "eight hundred thirteen thousand, four hundred two".