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BaseRepresentation
bin1100010010110111110
3202110122102
41202112332
5100343003
612345102
73265400
oct1422676
9673572
10402878
11255763
12175192
131114b8
14a6b70
157e588
hex625be

402878 has 12 divisors (see below), whose sum is σ = 703152. Its totient is φ = 172620.

The previous prime is 402869. The next prime is 402881. The reversal of 402878 is 878204.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 402878.

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 402878.

It is an unprimeable number.

402878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 5 ways as a sum of consecutive naturals, for example, 1958 + ... + 2153.

It is an arithmetic number, because the mean of its divisors is an integer number (58596).

2402878 is an apocalyptic number.

402878 is a deficient number, since it is larger than the sum of its proper divisors (300274).

402878 is a wasteful number, since it uses less digits than its factorization.

402878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4127 (or 4120 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 402878 is about 634.7267128458. The cubic root of 402878 is about 73.8569185585.

The spelling of 402878 in words is "four hundred two thousand, eight hundred seventy-eight".