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402879 = 3134293
BaseRepresentation
bin1100010010110111111
3202110122110
41202112333
5100343004
612345103
73265401
oct1422677
9673573
10402879
11255764
12175193
131114b9
14a6b71
157e589
hex625bf

402879 has 4 divisors (see below), whose sum is σ = 537176. Its totient is φ = 268584.

The previous prime is 402869. The next prime is 402881. The reversal of 402879 is 978204.

402879 is digitally balanced in base 7, 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 is not a de Polignac number, because 402879 - 24 = 402863 is a prime.

It is a super-2 number, since 2×4028792 = 324622977282, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

402879 is strictly pandigital in base 7.

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 402879.

It is not an unprimeable number, because it can be changed into a prime (402859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67144 + ... + 67149.

It is an arithmetic number, because the mean of its divisors is an integer number (134294).

2402879 is an apocalyptic number.

402879 is a deficient number, since it is larger than the sum of its proper divisors (134297).

402879 is a wasteful number, since it uses less digits than its factorization.

402879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134296.

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

The square root of 402879 is about 634.7275005859. The cubic root of 402879 is about 73.8569796662.

The spelling of 402879 in words is "four hundred two thousand, eight hundred seventy-nine".

Divisors: 1 3 134293 402879