402369 has 16 divisors (see below), whose sum is σ = 596160. Its totient is φ = 239360.

The previous prime is 402361. The next prime is 402371. The reversal of 402369 is 963204.

It is not a de Polignac number, because 402369 - 2³ = 402361 is a prime.

It is a super-2 number, since 2×402369² = 323801624322, which contains 22 as substring.

402369 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (402361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2869 + ... + 3005.

It is an arithmetic number, because the mean of its divisors is an integer number (37260).

2⁴⁰²³⁶⁹ is an apocalyptic number.

It is an amenable number.

402369 is a deficient number, since it is larger than the sum of its proper divisors (193791).

402369 is a wasteful number, since it uses less digits than its factorization.

402369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 402369 is about 634.3256261574. The cubic root of 402369 is about 73.8258015996.

The spelling of 402369 in words is "four hundred two thousand, three hundred sixty-nine".