402340 has 12 divisors (see below), whose sum is σ = 844956. Its totient is φ = 160928.

The previous prime is 402331. The next prime is 402341. The reversal of 402340 is 43204.

It can be written as a sum of positive squares in 2 ways, for example, as 112896 + 289444 = 336^2 + 538^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 402340.

It is not an unprimeable number, because it can be changed into a prime (402341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10039 + ... + 10078.

It is an arithmetic number, because the mean of its divisors is an integer number (70413).

2⁴⁰²³⁴⁰ is an apocalyptic number.

It is an amenable number.

402340 is an abundant number, since it is smaller than the sum of its proper divisors (442616).

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

402340 is a wasteful number, since it uses less digits than its factorization.

402340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20126 (or 20124 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 402340 is about 634.3027668235. The cubic root of 402340 is about 73.8240279377.

Adding to 402340 its reverse (43204), we get a palindrome (445544).

The spelling of 402340 in words is "four hundred two thousand, three hundred forty", and thus it is an iban number.