16123428 has 48 divisors (see below), whose sum is σ = 42020160. Its totient is φ = 5346432.

The previous prime is 16123421. The next prime is 16123447. The reversal of 16123428 is 82432161.

16123428 is a `hidden beast` number, since 1 + 612 + 3 + 42 + 8 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (16123421) 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, 36175 + ... + 36617.

It is an arithmetic number, because the mean of its divisors is an integer number (875420).

Almost surely, 2^16123428 is an apocalyptic number.

16123428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16123428 is an abundant number, since it is smaller than the sum of its proper divisors (25896732).

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

16123428 is a wasteful number, since it uses less digits than its factorization.

16123428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 785 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 16123428 is about 4015.3988593912. The cubic root of 16123428 is about 252.6305073145.

Adding to 16123428 its reverse (82432161), we get a palindrome (98555589).

The spelling of 16123428 in words is "sixteen million, one hundred twenty-three thousand, four hundred twenty-eight".