28330450 has 24 divisors (see below), whose sum is σ = 52834788. Its totient is φ = 11302080.

The previous prime is 28330447. The next prime is 28330529. The reversal of 28330450 is 5403382.

It can be written as a sum of positive squares in 6 ways, for example, as 11675889 + 16654561 = 3417^2 + 4081^2 .

It is a super-2 number, since 2×28330450² = 1605228794405000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36264 + ... + 37036.

Almost surely, 2^28330450 is an apocalyptic number.

28330450 is a deficient number, since it is larger than the sum of its proper divisors (24504338).

28330450 is a wasteful number, since it uses less digits than its factorization.

28330450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 28330450 is about 5322.6356253270. The cubic root of 28330450 is about 304.8488008079.

The spelling of 28330450 in words is "twenty-eight million, three hundred thirty thousand, four hundred fifty".