428166532388 has 24 divisors (see below), whose sum is σ = 901403227200. Its totient is φ = 173842050528.

The previous prime is 428166532373. The next prime is 428166532403. The reversal of 428166532388 is 883235661824.

It is an interprime number because it is at equal distance from previous prime (428166532373) and next prime (428166532403).

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, 402411623 + ... + 402412686.

It is an arithmetic number, because the mean of its divisors is an integer number (37558467800).

Almost surely, 2^428166532388 is an apocalyptic number.

It is an amenable number.

428166532388 is an abundant number, since it is smaller than the sum of its proper divisors (473236694812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428166532388 is a wasteful number, since it uses less digits than its factorization.

428166532388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804824339 (or 804824337 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 56.

The spelling of 428166532388 in words is "four hundred twenty-eight billion, one hundred sixty-six million, five hundred thirty-two thousand, three hundred eighty-eight".