28169152 has 28 divisors (see below), whose sum is σ = 60981336. Its totient is φ = 12803840.

The previous prime is 28169149. The next prime is 28169159. The reversal of 28169152 is 25196182.

It is a super-2 number, since 2×28169152² = 1587002248798208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28169159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19303 + ... + 20710.

Almost surely, 2^28169152 is an apocalyptic number.

28169152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28169152 is an abundant number, since it is smaller than the sum of its proper divisors (32812184).

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

28169152 is a wasteful number, since it uses less digits than its factorization.

28169152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40036 (or 40026 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 28169152 is about 5307.4619169618. The cubic root of 28169152 is about 304.2691522123.

The spelling of 28169152 in words is "twenty-eight million, one hundred sixty-nine thousand, one hundred fifty-two".