402445342 has 32 divisors (see below), whose sum is σ = 669271680. Its totient is φ = 180321120.

The previous prime is 402445339. The next prime is 402445343. The reversal of 402445342 is 243544204.

It is a self number, because there is not a number n which added to its sum of digits gives 402445342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402445343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 199117 + ... + 201127.

It is an arithmetic number, because the mean of its divisors is an integer number (20914740).

Almost surely, 2^402445342 is an apocalyptic number.

402445342 is a deficient number, since it is larger than the sum of its proper divisors (266826338).

402445342 is a wasteful number, since it uses less digits than its factorization.

402445342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248.

The product of its (nonzero) digits is 15360, while the sum is 28.

The square root of 402445342 is about 20061.0404017339. The cubic root of 402445342 is about 738.3047032648.

Adding to 402445342 its reverse (243544204), we get a palindrome (645989546).

The spelling of 402445342 in words is "four hundred two million, four hundred forty-five thousand, three hundred forty-two".