168993604 has 48 divisors (see below), whose sum is σ = 335865600. Its totient is φ = 73814400.

The previous prime is 168993593. The next prime is 168993653. The reversal of 168993604 is 406399861.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120097 + ... + 121495.

It is an arithmetic number, because the mean of its divisors is an integer number (6997200).

Almost surely, 2^168993604 is an apocalyptic number.

It is an amenable number.

168993604 is a deficient number, since it is larger than the sum of its proper divisors (166871996).

168993604 is a wasteful number, since it uses less digits than its factorization.

168993604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1538 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 168993604 is about 12999.7539976724. The cubic root of 168993604 is about 552.8705065178.

It can be divided in two parts, 16899 and 3604, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 168993604 in words is "one hundred sixty-eight million, nine hundred ninety-three thousand, six hundred four".