402787 has 8 divisors (see below), whose sum is σ = 502272. Its totient is φ = 313800.

The previous prime is 402769. The next prime is 402797. The reversal of 402787 is 787204.

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 402787 - 2¹¹ = 400739 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 (402757) 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, 2539 + ... + 2692.

It is an arithmetic number, because the mean of its divisors is an integer number (62784).

2⁴⁰²⁷⁸⁷ is an apocalyptic number.

402787 is a deficient number, since it is larger than the sum of its proper divisors (99485).

402787 is a wasteful number, since it uses less digits than its factorization.

402787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 402787 is about 634.6550244030. The cubic root of 402787 is about 73.8513573334.

It can be divided in two parts, 4027 and 87, that added together give a palindrome (4114).

The spelling of 402787 in words is "four hundred two thousand, seven hundred eighty-seven".