67990128 has 20 divisors (see below), whose sum is σ = 175641288. Its totient is φ = 22663360.

The previous prime is 67990103. The next prime is 67990129. The reversal of 67990128 is 82109976.

It is a self number, because there is not a number n which added to its sum of digits gives 67990128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67990129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708183 + ... + 708278.

Almost surely, 2^67990128 is an apocalyptic number.

It is an amenable number.

67990128 is an abundant number, since it is smaller than the sum of its proper divisors (107651160).

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

67990128 is a wasteful number, since it uses less digits than its factorization.

67990128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416472 (or 1416466 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 67990128 is about 8245.6126515863. The cubic root of 67990128 is about 408.1457572264.

The spelling of 67990128 in words is "sixty-seven million, nine hundred ninety thousand, one hundred twenty-eight".