16042428 has 48 divisors (see below), whose sum is σ = 42084000. Its totient is φ = 5284224.

The previous prime is 16042427. The next prime is 16042447. The reversal of 16042428 is 82424061.

It is a super-2 number, since 2×16042428² = 514718992270368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16042427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8778 + ... + 10446.

It is an arithmetic number, because the mean of its divisors is an integer number (876750).

Almost surely, 2^16042428 is an apocalyptic number.

16042428 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 16042428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21042000).

16042428 is an abundant number, since it is smaller than the sum of its proper divisors (26041572).

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

16042428 is a wasteful number, since it uses less digits than its factorization.

16042428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771 (or 1763 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 16042428 is about 4005.2999887649. The cubic root of 16042428 is about 252.2067464340.

Adding to 16042428 its reverse (82424061), we get a palindrome (98466489).

The spelling of 16042428 in words is "sixteen million, forty-two thousand, four hundred twenty-eight".