28450390 has 16 divisors (see below), whose sum is σ = 52079760. Its totient is φ = 11187040.

The previous prime is 28450327. The next prime is 28450399. The reversal of 28450390 is 9305482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28450399) 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 7 ways as a sum of consecutive naturals, for example, 23521 + ... + 24700.

It is an arithmetic number, because the mean of its divisors is an integer number (3254985).

Almost surely, 2^28450390 is an apocalyptic number.

28450390 is a deficient number, since it is larger than the sum of its proper divisors (23629370).

28450390 is a wasteful number, since it uses less digits than its factorization.

28450390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48287.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28450390 is about 5333.8907000425. The cubic root of 28450390 is about 305.2783984975.

The spelling of 28450390 in words is "twenty-eight million, four hundred fifty thousand, three hundred ninety".