28053890 has 8 divisors (see below), whose sum is σ = 50497020. Its totient is φ = 11221552.

The previous prime is 28053887. The next prime is 28053913. The reversal of 28053890 is 9835082.

It can be written as a sum of positive squares in 2 ways, for example, as 27678121 + 375769 = 5261^2 + 613^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 28053890.

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, 1402685 + ... + 1402704.

Almost surely, 2^28053890 is an apocalyptic number.

28053890 is a deficient number, since it is larger than the sum of its proper divisors (22443130).

28053890 is a wasteful number, since it uses less digits than its factorization.

28053890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2805396.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 28053890 is about 5296.5923007156. The cubic root of 28053890 is about 303.8535839826.

The spelling of 28053890 in words is "twenty-eight million, fifty-three thousand, eight hundred ninety".