168237972 has 90 divisors (see below), whose sum is σ = 511660842. Its totient is φ = 48063456.

The previous prime is 168237959. The next prime is 168238013. The reversal of 168237972 is 279732861.

It can be written as a sum of positive squares in only one way, i.e., 99082116 + 69155856 = 9954^2 + 8316^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 10578 + ... + 21174.

Almost surely, 2^168237972 is an apocalyptic number.

168237972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168237972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255830421).

168237972 is an abundant number, since it is smaller than the sum of its proper divisors (343422870).

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

168237972 is a wasteful number, since it uses less digits than its factorization.

168237972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10627 (or 10609 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 168237972 is about 12970.6581174588. The cubic root of 168237972 is about 552.0452467637.

The spelling of 168237972 in words is "one hundred sixty-eight million, two hundred thirty-seven thousand, nine hundred seventy-two".