162491868 has 162 divisors, whose sum is σ = 523140072. Its totient is φ = 41627520.

The previous prime is 162491851. The next prime is 162491869. The reversal of 162491868 is 868194261.

162491868 is a `hidden beast` number, since 1 + 624 + 9 + 18 + 6 + 8 = 666.

It is a super-2 number, since 2×162491868² = 52807214332258848, which contains 22 as substring.

Its product of digits (165888) is a multiple of the sum of its prime divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162491869) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 2225880 + ... + 2225952.

Almost surely, 2^162491868 is an apocalyptic number.

162491868 is a gapful number since it is divisible by the number (18) 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 162491868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261570036).

162491868 is an abundant number, since it is smaller than the sum of its proper divisors (360648204).

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

162491868 is a wasteful number, since it uses less digits than its factorization.

162491868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185 (or 96 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 162491868 is about 12747.2298167092. The cubic root of 162491868 is about 545.6873386024.

The spelling of 162491868 in words is "one hundred sixty-two million, four hundred ninety-one thousand, eight hundred sixty-eight".