402311 has 8 divisors (see below), whose sum is σ = 495264. Its totient is φ = 318240.

The previous prime is 402307. The next prime is 402313. The reversal of 402311 is 113204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402311 - 2² = 402307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 402292 and 402301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2120 + ... + 2301.

It is an arithmetic number, because the mean of its divisors is an integer number (61908).

2⁴⁰²³¹¹ is an apocalyptic number.

402311 is a deficient number, since it is larger than the sum of its proper divisors (92953).

402311 is a wasteful number, since it uses less digits than its factorization.

402311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 402311 is about 634.2799066658. The cubic root of 402311 is about 73.8222541906.

Adding to 402311 its reverse (113204), we get a palindrome (515515).

It can be divided in two parts, 4023 and 11, that multiplied together give a triangular number (44253 = T₂₉₇).

The spelling of 402311 in words is "four hundred two thousand, three hundred eleven", and thus it is an iban number.