400302013 has 4 divisors (see below), whose sum is σ = 421370560. Its totient is φ = 379233468.

The previous prime is 400301971. The next prime is 400302053. The reversal of 400302013 is 310203004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400302013 - 2¹⁷ = 400170941 is a prime.

It is a super-2 number, since 2×400302013² = 320483403223704338, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400301984 and 400302002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400302053) 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, 10534245 + ... + 10534282.

It is an arithmetic number, because the mean of its divisors is an integer number (105342640).

Almost surely, 2^400302013 is an apocalyptic number.

It is an amenable number.

400302013 is a deficient number, since it is larger than the sum of its proper divisors (21068547).

400302013 is a wasteful number, since it uses less digits than its factorization.

400302013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21068546.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 400302013 is about 20007.5489003526. The cubic root of 400302013 is about 736.9916906447.

Adding to 400302013 its reverse (310203004), we get a palindrome (710505017).

Subtracting from 400302013 its reverse (310203004), we obtain a palindrome (90099009).

The spelling of 400302013 in words is "four hundred million, three hundred two thousand, thirteen".