402722 has 8 divisors (see below), whose sum is σ = 614172. Its totient is φ = 198000.

The previous prime is 402697. The next prime is 402739. The reversal of 402722 is 227204.

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 78961 = 569^2 + 281^2 .

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 402722.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402722.

It is an unprimeable number.

402722 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1529 + ... + 1772.

2⁴⁰²⁷²² is an apocalyptic number.

402722 is a deficient number, since it is larger than the sum of its proper divisors (211450).

402722 is a wasteful number, since it uses less digits than its factorization.

402722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364.

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 402722 is about 634.6038134143. The cubic root of 402722 is about 73.8473845170.

Adding to 402722 its reverse (227204), we get a palindrome (629926).

The spelling of 402722 in words is "four hundred two thousand, seven hundred twenty-two", and thus it is an iban number.