402986 has 4 divisors (see below), whose sum is σ = 604482. Its totient is φ = 201492.

The previous prime is 402949. The next prime is 402991. The reversal of 402986 is 689204.

402986 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 330625 + 72361 = 575^2 + 269^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100745 + ... + 100748.

2⁴⁰²⁹⁸⁶ is an apocalyptic number.

402986 is a deficient number, since it is larger than the sum of its proper divisors (201496).

402986 is a wasteful number, since it uses less digits than its factorization.

402986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201495.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 402986 is about 634.8117831295. The cubic root of 402986 is about 73.8635176071.

It can be divided in two parts, 40298 and 6, that added together give a palindrome (40304).

The spelling of 402986 in words is "four hundred two thousand, nine hundred eighty-six".