402489346 has 16 divisors (see below), whose sum is σ = 701294400. Its totient is φ = 169667280.

The previous prime is 402489323. The next prime is 402489371. The reversal of 402489346 is 643984204.

It is a junction number, because it is equal to n+sod(n) for n = 402489299 and 402489308.

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 7 ways as a sum of consecutive naturals, for example, 234796 + ... + 236503.

It is an arithmetic number, because the mean of its divisors is an integer number (43830900).

Almost surely, 2^402489346 is an apocalyptic number.

402489346 is a deficient number, since it is larger than the sum of its proper divisors (298805054).

402489346 is a wasteful number, since it uses less digits than its factorization.

402489346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471369.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 402489346 is about 20062.1371244441. The cubic root of 402489346 is about 738.3316114125.

It can be divided in two parts, 40248 and 9346, that added together give a palindrome (49594).

The spelling of 402489346 in words is "four hundred two million, four hundred eighty-nine thousand, three hundred forty-six".