168872890 has 32 divisors (see below), whose sum is σ = 307740096. Its totient is φ = 66718080.

The previous prime is 168872881. The next prime is 168872933. The reversal of 168872890 is 98278861.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 510025 + ... + 510355.

It is an arithmetic number, because the mean of its divisors is an integer number (9616878).

Almost surely, 2^168872890 is an apocalyptic number.

168872890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168872890 is a deficient number, since it is larger than the sum of its proper divisors (138867206).

168872890 is a wasteful number, since it uses less digits than its factorization.

168872890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814.

The product of its (nonzero) digits is 387072, while the sum is 49.

The square root of 168872890 is about 12995.1102342381. The cubic root of 168872890 is about 552.7388346559.

The spelling of 168872890 in words is "one hundred sixty-eight million, eight hundred seventy-two thousand, eight hundred ninety".