168804636 has 288 divisors, whose sum is σ = 566673408. Its totient is φ = 37889280.

The previous prime is 168804553. The next prime is 168804733. The reversal of 168804636 is 636408861.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3591565 + ... + 3591611.

It is an arithmetic number, because the mean of its divisors is an integer number (1967616).

Almost surely, 2^168804636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168804636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283336704).

168804636 is an abundant number, since it is smaller than the sum of its proper divisors (397868772).

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

168804636 is a wasteful number, since it uses less digits than its factorization.

168804636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 168804636 is about 12992.4838271979. The cubic root of 168804636 is about 552.6643571001.

The spelling of 168804636 in words is "one hundred sixty-eight million, eight hundred four thousand, six hundred thirty-six".