402857169 has 16 divisors (see below), whose sum is σ = 631049664. Its totient is φ = 225374400.

The previous prime is 402857149. The next prime is 402857173. The reversal of 402857169 is 961758204.

It is not a de Polignac number, because 402857169 - 2⁵ = 402857137 is a prime.

It is a super-2 number, since 2×402857169² = 324587797229389122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 402857169.

It is not an unprimeable number, because it can be changed into a prime (402857149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469102 + ... + 469959.

It is an arithmetic number, because the mean of its divisors is an integer number (39440604).

Almost surely, 2^402857169 is an apocalyptic number.

It is an amenable number.

402857169 is a deficient number, since it is larger than the sum of its proper divisors (228192495).

402857169 is a wasteful number, since it uses less digits than its factorization.

402857169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939088.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 402857169 is about 20071.3021251736. The cubic root of 402857169 is about 738.5564560076.

The spelling of 402857169 in words is "four hundred two million, eight hundred fifty-seven thousand, one hundred sixty-nine".