28545490 has 8 divisors (see below), whose sum is σ = 51381900. Its totient is φ = 11418192.

The previous prime is 28545481. The next prime is 28545511. The reversal of 28545490 is 9454582.

It can be written as a sum of positive squares in 2 ways, for example, as 28100601 + 444889 = 5301^2 + 667^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 1427265 + ... + 1427284.

Almost surely, 2^28545490 is an apocalyptic number.

28545490 is a deficient number, since it is larger than the sum of its proper divisors (22836410).

28545490 is a wasteful number, since it uses less digits than its factorization.

28545490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2854556.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 28545490 is about 5342.7979561275. The cubic root of 28545490 is about 305.6181675671.

The spelling of 28545490 in words is "twenty-eight million, five hundred forty-five thousand, four hundred ninety".