28820450 has 24 divisors (see below), whose sum is σ = 54117072. Its totient is φ = 11418320.

The previous prime is 28820443. The next prime is 28820453. The reversal of 28820450 is 5402882.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28820453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2657 + ... + 8043.

It is an arithmetic number, because the mean of its divisors is an integer number (2254878).

Almost surely, 2^28820450 is an apocalyptic number.

28820450 is a deficient number, since it is larger than the sum of its proper divisors (25296622).

28820450 is a wasteful number, since it uses less digits than its factorization.

28820450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5506 (or 5501 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 28820450 is about 5368.4681241486. The cubic root of 28820450 is about 306.5963068472.

The spelling of 28820450 in words is "twenty-eight million, eight hundred twenty thousand, four hundred fifty".