402340013 has 8 divisors (see below), whose sum is σ = 412205976. Its totient is φ = 392558400.

The previous prime is 402339983. The next prime is 402340019. The reversal of 402340013 is 310043204.

It can be written as a sum of positive squares in 4 ways, for example, as 10220809 + 392119204 = 3197^2 + 19802^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 402340013 - 2¹⁴ = 402323629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402339973 and 402340000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402340019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11378 + ... + 30563.

It is an arithmetic number, because the mean of its divisors is an integer number (51525747).

Almost surely, 2^402340013 is an apocalyptic number.

It is an amenable number.

402340013 is a deficient number, since it is larger than the sum of its proper divisors (9865963).

402340013 is a wasteful number, since it uses less digits than its factorization.

402340013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42175.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 402340013 is about 20058.4150171443. The cubic root of 402340013 is about 738.2402873279.

Adding to 402340013 its reverse (310043204), we get a palindrome (712383217).

The spelling of 402340013 in words is "four hundred two million, three hundred forty thousand, thirteen".