16168428 has 72 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 4892160.

The previous prime is 16168421. The next prime is 16168429. The reversal of 16168428 is 82486161.

It is a super-2 number, since 2×16168428² = 522836127982368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16168392 and 16168401.

It is not an unprimeable number, because it can be changed into a prime (16168421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17293 + ... + 18203.

It is an arithmetic number, because the mean of its divisors is an integer number (622440).

Almost surely, 2^16168428 is an apocalyptic number.

16168428 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 16168428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22407840).

16168428 is an abundant number, since it is smaller than the sum of its proper divisors (28647252).

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

16168428 is a wasteful number, since it uses less digits than its factorization.

16168428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967 (or 962 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 16168428 is about 4020.9983834864. The cubic root of 16168428 is about 252.8653170365.

The spelling of 16168428 in words is "sixteen million, one hundred sixty-eight thousand, four hundred twenty-eight".