402844089 has 8 divisors (see below), whose sum is σ = 537229120. Its totient is φ = 268510896.

The previous prime is 402844067. The next prime is 402844093. The reversal of 402844089 is 980448204.

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

It is a de Polignac number, because none of the positive numbers 2^k-402844089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402844009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12099 + ... + 30855.

It is an arithmetic number, because the mean of its divisors is an integer number (67153640).

Almost surely, 2^402844089 is an apocalyptic number.

It is an amenable number.

402844089 is a deficient number, since it is larger than the sum of its proper divisors (134385031).

402844089 is a wasteful number, since it uses less digits than its factorization.

402844089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25919.

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 402844089 is about 20070.9762841771. The cubic root of 402844089 is about 738.5484627503.

The spelling of 402844089 in words is "four hundred two million, eight hundred forty-four thousand, eighty-nine".