402001822 has 16 divisors (see below), whose sum is σ = 639357840. Its totient is φ = 188915328.

The previous prime is 402001801. The next prime is 402001841. The reversal of 402001822 is 228100204.

It is a self number, because there is not a number n which added to its sum of digits gives 402001822.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17929 + ... + 33547.

It is an arithmetic number, because the mean of its divisors is an integer number (39959865).

Almost surely, 2^402001822 is an apocalyptic number.

402001822 is a deficient number, since it is larger than the sum of its proper divisors (237356018).

402001822 is a wasteful number, since it uses less digits than its factorization.

402001822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16395.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 402001822 is about 20049.9830922622. The cubic root of 402001822 is about 738.0333842121.

The spelling of 402001822 in words is "four hundred two million, one thousand, eight hundred twenty-two".