28305998 has 16 divisors (see below), whose sum is σ = 48660480. Its totient is φ = 12097176.

The previous prime is 28305983. The next prime is 28306039. The reversal of 28305998 is 89950382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2723 + ... + 8001.

It is an arithmetic number, because the mean of its divisors is an integer number (3041280).

Almost surely, 2^28305998 is an apocalyptic number.

28305998 is a deficient number, since it is larger than the sum of its proper divisors (20354482).

28305998 is a wasteful number, since it uses less digits than its factorization.

28305998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5671.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 28305998 is about 5320.3381471482. The cubic root of 28305998 is about 304.7610706040.

The spelling of 28305998 in words is "twenty-eight million, three hundred five thousand, nine hundred ninety-eight".