402188 has 6 divisors (see below), whose sum is σ = 703836. Its totient is φ = 201092.

The previous prime is 402139. The next prime is 402197. The reversal of 402188 is 881204.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 402188.

It is an unprimeable number.

402188 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50270 + ... + 50277.

It is an arithmetic number, because the mean of its divisors is an integer number (117306).

2⁴⁰²¹⁸⁸ is an apocalyptic number.

It is an amenable number.

402188 is a deficient number, since it is larger than the sum of its proper divisors (301648).

402188 is a wasteful number, since it uses less digits than its factorization.

402188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100551 (or 100549 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 402188 is about 634.1829389064. The cubic root of 402188 is about 73.8147301086.

The spelling of 402188 in words is "four hundred two thousand, one hundred eighty-eight".