28169392 has 40 divisors (see below), whose sum is σ = 56058912. Its totient is φ = 13708800.

The previous prime is 28169389. The next prime is 28169423. The reversal of 28169392 is 29396182.

It is a happy number.

It is a super-3 number, since 3×28169392³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 155542 + ... + 155722.

Almost surely, 2^28169392 is an apocalyptic number.

It is an amenable number.

28169392 is a deficient number, since it is larger than the sum of its proper divisors (27889520).

28169392 is a wasteful number, since it uses less digits than its factorization.

28169392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397 (or 391 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 28169392 is about 5307.4845265907. The cubic root of 28169392 is about 304.2700163300.

It can be divided in two parts, 28169 and 392, that added together give a 4-th power (28561 = 13⁴).

The spelling of 28169392 in words is "twenty-eight million, one hundred sixty-nine thousand, three hundred ninety-two".