162890388 has 18 divisors (see below), whose sum is σ = 411750794. Its totient is φ = 54296784.

The previous prime is 162890323. The next prime is 162890437. The reversal of 162890388 is 883098261.

It can be written as a sum of positive squares in only one way, i.e., 161493264 + 1397124 = 12708^2 + 1182^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2262331 + ... + 2262402.

Almost surely, 2^162890388 is an apocalyptic number.

162890388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

162890388 is an abundant number, since it is smaller than the sum of its proper divisors (248860406).

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

162890388 is a wasteful number, since it uses less digits than its factorization.

162890388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4524743 (or 4524738 counting only the distinct ones).

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

The square root of 162890388 is about 12762.8518756585. The cubic root of 162890388 is about 546.1330835275.

The spelling of 162890388 in words is "one hundred sixty-two million, eight hundred ninety thousand, three hundred eighty-eight".