28497642 has 8 divisors (see below), whose sum is σ = 56995296. Its totient is φ = 9499212.

The previous prime is 28497629. The next prime is 28497647. The reversal of 28497642 is 24679482.

It is a sphenic number, since it is the product of 3 distinct primes.

28497642 is an admirable number.

It is a super-3 number, since 3×28497642³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 28497594 and 28497603.

It is not an unprimeable number, because it can be changed into a prime (28497647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2374798 + ... + 2374809.

It is an arithmetic number, because the mean of its divisors is an integer number (7124412).

Almost surely, 2^28497642 is an apocalyptic number.

28497642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28497642 is a wasteful number, since it uses less digits than its factorization.

28497642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4749612.

The product of its digits is 193536, while the sum is 42.

The square root of 28497642 is about 5338.3182745131. The cubic root of 28497642 is about 305.4473128344.

The spelling of 28497642 in words is "twenty-eight million, four hundred ninety-seven thousand, six hundred forty-two".