438164327902 has 16 divisors (see below), whose sum is σ = 761718269952. Its totient is φ = 185139856440.

The previous prime is 438164327813. The next prime is 438164327983. The reversal of 438164327902 is 209723461834.

It is a super-2 number, since 2×438164327902² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220403598 + ... + 220405585.

It is an arithmetic number, because the mean of its divisors is an integer number (47607391872).

Almost surely, 2^438164327902 is an apocalyptic number.

438164327902 is a deficient number, since it is larger than the sum of its proper divisors (323553942050).

438164327902 is a wasteful number, since it uses less digits than its factorization.

438164327902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440809263.

The product of its (nonzero) digits is 1741824, while the sum is 49.

The spelling of 438164327902 in words is "four hundred thirty-eight billion, one hundred sixty-four million, three hundred twenty-seven thousand, nine hundred two".