402336643 has 8 divisors (see below), whose sum is σ = 407717856. Its totient is φ = 396984000.

The previous prime is 402336619. The next prime is 402336667. The reversal of 402336643 is 346633204.

It is an interprime number because it is at equal distance from previous prime (402336619) and next prime (402336667).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402336643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402336043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21993 + ... + 35893.

It is an arithmetic number, because the mean of its divisors is an integer number (50964732).

Almost surely, 2^402336643 is an apocalyptic number.

402336643 is a deficient number, since it is larger than the sum of its proper divisors (5381213).

402336643 is a wasteful number, since it uses less digits than its factorization.

402336643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14285.

The product of its (nonzero) digits is 31104, while the sum is 31.

The square root of 402336643 is about 20058.3310123250. The cubic root of 402336643 is about 738.2382261552.

Adding to 402336643 its reverse (346633204), we get a palindrome (748969847).

The spelling of 402336643 in words is "four hundred two million, three hundred thirty-six thousand, six hundred forty-three".