402312 has 16 divisors (see below), whose sum is σ = 1005840. Its totient is φ = 134096.

The previous prime is 402307. The next prime is 402313. The reversal of 402312 is 213204.

It is a Harshad number since it is a multiple of its sum of digits (12).

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8358 + ... + 8405.

It is an arithmetic number, because the mean of its divisors is an integer number (62865).

2⁴⁰²³¹² is an apocalyptic number.

It is an amenable number.

402312 is an abundant number, since it is smaller than the sum of its proper divisors (603528).

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

402312 is a wasteful number, since it uses less digits than its factorization.

402312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16772 (or 16768 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 402312 is about 634.2806949608. The cubic root of 402312 is about 73.8223153557.

Adding to 402312 its reverse (213204), we get a palindrome (615516).

The spelling of 402312 in words is "four hundred two thousand, three hundred twelve", and thus it is an iban number.