402987 has 8 divisors (see below), whose sum is σ = 578704. Its totient is φ = 247968.

The previous prime is 402949. The next prime is 402991. The reversal of 402987 is 789204.

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

It is not a de Polignac number, because 402987 - 2⁶ = 402923 is a prime.

It is a super-3 number, since 3×402987³ = 196333479759956409, which contains 333 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402987.

It is not an unprimeable number, because it can be changed into a prime (402947) 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, 5128 + ... + 5205.

It is an arithmetic number, because the mean of its divisors is an integer number (72338).

2⁴⁰²⁹⁸⁷ is an apocalyptic number.

402987 is a deficient number, since it is larger than the sum of its proper divisors (175717).

402987 is a wasteful number, since it uses less digits than its factorization.

402987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10349.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 402987 is about 634.8125707640. The cubic root of 402987 is about 73.8635787039.

The spelling of 402987 in words is "four hundred two thousand, nine hundred eighty-seven".