402347 has 8 divisors (see below), whose sum is σ = 445440. Its totient is φ = 360360.

The previous prime is 402343. The next prime is 402359. The reversal of 402347 is 743204.

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 402347 - 2² = 402343 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (402341) 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, 638 + ... + 1100.

It is an arithmetic number, because the mean of its divisors is an integer number (55680).

2⁴⁰²³⁴⁷ is an apocalyptic number.

402347 is a deficient number, since it is larger than the sum of its proper divisors (43093).

402347 is a wasteful number, since it uses less digits than its factorization.

402347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 553.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 402347 is about 634.3082846692. The cubic root of 402347 is about 73.8244560708.

The spelling of 402347 in words is "four hundred two thousand, three hundred forty-seven", and thus it is an iban number.