28780353 has 40 divisors (see below), whose sum is σ = 49577088. Its totient is φ = 16298496.

The previous prime is 28780351. The next prime is 28780357. The reversal of 28780353 is 35308782.

It is not a de Polignac number, because 28780353 - 2¹ = 28780351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28780351) 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 39 ways as a sum of consecutive naturals, for example, 109300 + ... + 109562.

Almost surely, 2^28780353 is an apocalyptic number.

It is an amenable number.

28780353 is a deficient number, since it is larger than the sum of its proper divisors (20796735).

28780353 is a wasteful number, since it uses less digits than its factorization.

28780353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28780353 is about 5364.7323325586. The cubic root of 28780353 is about 306.4540548726.

The spelling of 28780353 in words is "twenty-eight million, seven hundred eighty thousand, three hundred fifty-three".