402447 has 8 divisors (see below), whose sum is σ = 540544. Its totient is φ = 266328.

The previous prime is 402443. The next prime is 402487. The reversal of 402447 is 744204.

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

It is not a de Polignac number, because 402447 - 2² = 402443 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402443) 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, 78 + ... + 900.

It is an arithmetic number, because the mean of its divisors is an integer number (67568).

2⁴⁰²⁴⁴⁷ is an apocalyptic number.

402447 is a deficient number, since it is larger than the sum of its proper divisors (138097).

402447 is a wasteful number, since it uses less digits than its factorization.

402447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989.

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 402447 is about 634.3871057958. The cubic root of 402447 is about 73.8305717156.

The spelling of 402447 in words is "four hundred two thousand, four hundred forty-seven", and thus it is an iban number.