405402402 has 32 divisors (see below), whose sum is σ = 818611200. Its totient is φ = 133840080.

The previous prime is 405402391. The next prime is 405402421. The reversal of 405402402 is 204204504.

It is a super-2 number, since 2×405402402² = 328702215094739208, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313377 + ... + 314667.

It is an arithmetic number, because the mean of its divisors is an integer number (25581600).

Almost surely, 2^405402402 is an apocalyptic number.

405402402 is an abundant number, since it is smaller than the sum of its proper divisors (413208798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405402402 is a wasteful number, since it uses less digits than its factorization.

405402402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 405402402 is about 20134.6070733948. The cubic root of 405402402 is about 740.1085803662.

Adding to 405402402 its reverse (204204504), we get a palindrome (609606906).

The spelling of 405402402 in words is "four hundred five million, four hundred two thousand, four hundred two".