402647 has 8 divisors (see below), whose sum is σ = 465696. Its totient is φ = 340992.

The previous prime is 402631. The next prime is 402691. The reversal of 402647 is 746204.

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

It is a cyclic number.

It is not a de Polignac number, because 402647 - 2⁴ = 402631 is a prime.

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 (402697) 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, 383 + ... + 975.

It is an arithmetic number, because the mean of its divisors is an integer number (58212).

2⁴⁰²⁶⁴⁷ is an apocalyptic number.

402647 is a deficient number, since it is larger than the sum of its proper divisors (63049).

402647 is an equidigital number, since it uses as much as digits as its factorization.

402647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 402647 is about 634.5447186763. The cubic root of 402647 is about 73.8427999668.

The spelling of 402647 in words is "four hundred two thousand, six hundred forty-seven".