168552990 has 96 divisors (see below), whose sum is σ = 464349600. Its totient is φ = 42301440.

The previous prime is 168552961. The next prime is 168553001. The reversal of 168552990 is 99255861.

168552990 is a `hidden beast` number, since 1 + 6 + 8 + 552 + 9 + 90 = 666.

168552990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×168552990² = 56820220875880200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 411906 + ... + 412314.

It is an arithmetic number, because the mean of its divisors is an integer number (4836975).

Almost surely, 2^168552990 is an apocalyptic number.

168552990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168552990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232174800).

168552990 is an abundant number, since it is smaller than the sum of its proper divisors (295796610).

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

168552990 is a wasteful number, since it uses less digits than its factorization.

168552990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 168552990 is about 12982.7959238371. The cubic root of 168552990 is about 552.3895918555.

The spelling of 168552990 in words is "one hundred sixty-eight million, five hundred fifty-two thousand, nine hundred ninety".