28701898 has 16 divisors (see below), whose sum is σ = 44595936. Its totient is φ = 13844880.

The previous prime is 28701889. The next prime is 28701931. The reversal of 28701898 is 89810782.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 5128 + ... + 9148.

It is an arithmetic number, because the mean of its divisors is an integer number (2787246).

Almost surely, 2^28701898 is an apocalyptic number.

28701898 is a deficient number, since it is larger than the sum of its proper divisors (15894038).

28701898 is a wasteful number, since it uses less digits than its factorization.

28701898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 28701898 is about 5357.4152349804. The cubic root of 28701898 is about 306.1753377342.

The spelling of 28701898 in words is "twenty-eight million, seven hundred one thousand, eight hundred ninety-eight".