402807 has 4 divisors (see below), whose sum is σ = 537080. Its totient is φ = 268536.

The previous prime is 402803. The next prime is 402817. The reversal of 402807 is 708204.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 402807 - 2² = 402803 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402807.

It is not an unprimeable number, because it can be changed into a prime (402803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67132 + ... + 67137.

It is an arithmetic number, because the mean of its divisors is an integer number (134270).

2⁴⁰²⁸⁰⁷ is an apocalyptic number.

402807 is a deficient number, since it is larger than the sum of its proper divisors (134273).

402807 is a wasteful number, since it uses less digits than its factorization.

402807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134272.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 402807 is about 634.6707807990. The cubic root of 402807 is about 73.8525796525.

The spelling of 402807 in words is "four hundred two thousand, eight hundred seven".