442102402 has 12 divisors (see below), whose sum is σ = 771423750. Its totient is φ = 189472416.

The previous prime is 442102373. The next prime is 442102421. The reversal of 442102402 is 204201244.

It can be written as a sum of positive squares in only one way, i.e., 441882441 + 219961 = 21021^2 + 469^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 442102402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2255527 + ... + 2255722.

Almost surely, 2^442102402 is an apocalyptic number.

442102402 is a deficient number, since it is larger than the sum of its proper divisors (329321348).

442102402 is a wasteful number, since it uses less digits than its factorization.

442102402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4511265 (or 4511258 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 442102402 is about 21026.2312838036. The cubic root of 442102402 is about 761.7999821759.

Adding to 442102402 its reverse (204201244), we get a palindrome (646303646).

The spelling of 442102402 in words is "four hundred forty-two million, one hundred two thousand, four hundred two".