402320459 has 4 divisors (see below), whose sum is σ = 423495240. Its totient is φ = 381145680.

The previous prime is 402320389. The next prime is 402320473. The reversal of 402320459 is 954023204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402320459 - 2¹² = 402316363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402340459) 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 3 ways as a sum of consecutive naturals, for example, 10587362 + ... + 10587399.

It is an arithmetic number, because the mean of its divisors is an integer number (105873810).

Almost surely, 2^402320459 is an apocalyptic number.

402320459 is a deficient number, since it is larger than the sum of its proper divisors (21174781).

402320459 is a wasteful number, since it uses less digits than its factorization.

402320459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21174780.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 402320459 is about 20057.9275848728. The cubic root of 402320459 is about 738.2283274730.

The spelling of 402320459 in words is "four hundred two million, three hundred twenty thousand, four hundred fifty-nine".