1667128434 has 8 divisors (see below), whose sum is σ = 3334256880. Its totient is φ = 555709476.

The previous prime is 1667128433. The next prime is 1667128451. The reversal of 1667128434 is 4348217661.

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

1667128434 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1667128433) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 138927364 + ... + 138927375.

It is an arithmetic number, because the mean of its divisors is an integer number (416782110).

Almost surely, 2^1667128434 is an apocalyptic number.

1667128434 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1667128434 is a wasteful number, since it uses less digits than its factorization.

1667128434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277854744.

The product of its digits is 193536, while the sum is 42.

The square root of 1667128434 is about 40830.4841264465. The cubic root of 1667128434 is about 1185.7405885282.

The spelling of 1667128434 in words is "one billion, six hundred sixty-seven million, one hundred twenty-eight thousand, four hundred thirty-four".