402706213 has 48 divisors (see below), whose sum is σ = 524697600. Its totient is φ = 302253120.

The previous prime is 402706193. The next prime is 402706229. The reversal of 402706213 is 312607204.

It is not a de Polignac number, because 402706213 - 2²¹ = 400609061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402706313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2897098 + ... + 2897236.

It is an arithmetic number, because the mean of its divisors is an integer number (10931200).

Almost surely, 2^402706213 is an apocalyptic number.

It is an amenable number.

402706213 is a deficient number, since it is larger than the sum of its proper divisors (121991387).

402706213 is a wasteful number, since it uses less digits than its factorization.

402706213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 402706213 is about 20067.5412793895. The cubic root of 402706213 is about 738.4641954702.

Subtracting from 402706213 its reverse (312607204), we obtain a palindrome (90099009).

The spelling of 402706213 in words is "four hundred two million, seven hundred six thousand, two hundred thirteen".