28447790 has 16 divisors (see below), whose sum is σ = 58521312. Its totient is φ = 9753504.

The previous prime is 28447789. The next prime is 28447799. The reversal of 28447790 is 9774482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28447799) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 203129 + ... + 203268.

It is an arithmetic number, because the mean of its divisors is an integer number (3657582).

Almost surely, 2^28447790 is an apocalyptic number.

28447790 is an abundant number, since it is smaller than the sum of its proper divisors (30073522).

28447790 is a wasteful number, since it uses less digits than its factorization.

28447790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406411.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 28447790 is about 5333.6469699447. The cubic root of 28447790 is about 305.2690987068.

The spelling of 28447790 in words is "twenty-eight million, four hundred forty-seven thousand, seven hundred ninety".