168428988 has 72 divisors (see below), whose sum is σ = 524011488. Its totient is φ = 44419968.

The previous prime is 168428959. The next prime is 168429017. The reversal of 168428988 is 889824861.

It is an interprime number because it is at equal distance from previous prime (168428959) and next prime (168429017).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 22431 + ... + 28982.

Almost surely, 2^168428988 is an apocalyptic number.

168428988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

168428988 is an abundant number, since it is smaller than the sum of its proper divisors (355582500).

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

168428988 is a wasteful number, since it uses less digits than its factorization.

168428988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51443 (or 51438 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 54.

The square root of 168428988 is about 12978.0194174612. The cubic root of 168428988 is about 552.2540969417.

The spelling of 168428988 in words is "one hundred sixty-eight million, four hundred twenty-eight thousand, nine hundred eighty-eight".