16553428 has 12 divisors (see below), whose sum is σ = 28997332. Its totient is φ = 8268480.

The previous prime is 16553413. The next prime is 16553443. The reversal of 16553428 is 82435561.

It is an interprime number because it is at equal distance from previous prime (16553413) and next prime (16553443).

It can be written as a sum of positive squares in 2 ways, for example, as 2022084 + 14531344 = 1422^2 + 3812^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16553393 and 16553402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5776 + ... + 8152.

Almost surely, 2^16553428 is an apocalyptic number.

It is an amenable number.

16553428 is a deficient number, since it is larger than the sum of its proper divisors (12443904).

16553428 is a wasteful number, since it uses less digits than its factorization.

16553428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122 (or 4120 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 16553428 is about 4068.5904192976. The cubic root of 16553428 is about 254.8566565897.

Adding to 16553428 its reverse (82435561), we get a palindrome (98988989).

The spelling of 16553428 in words is "sixteen million, five hundred fifty-three thousand, four hundred twenty-eight".