402655442 has 18 divisors (see below), whose sum is σ = 702939447. Its totient is φ = 172481484.

The previous prime is 402655441. The next prime is 402655453. The reversal of 402655442 is 244556204.

It can be written as a sum of positive squares in only one way, i.e., 201327721 + 201327721 = 14189^2 + 14189^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14189.

It is a junction number, because it is equal to n+sod(n) for n = 402655399 and 402655408.

It is not an unprimeable number, because it can be changed into a prime (402655441) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 197633 + ... + 199659.

Almost surely, 2^402655442 is an apocalyptic number.

402655442 is a deficient number, since it is larger than the sum of its proper divisors (300284005).

402655442 is an frugal number, since it uses more digits than its factorization.

402655442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 402655442 is about 20066.2762365118. The cubic root of 402655442 is about 738.4331603216.

Multiplying 402655442 by its sum of digits (32), we get a square (12884974144 = 113512²).

The spelling of 402655442 in words is "four hundred two million, six hundred fifty-five thousand, four hundred forty-two".