100028885 has 24 divisors (see below), whose sum is σ = 133326648. Its totient is φ = 71984000.

The previous prime is 100028839. The next prime is 100028899. The reversal of 100028885 is 588820001.

It can be written as a sum of positive squares in 4 ways, for example, as 9284209 + 90744676 = 3047^2 + 9526^2 .

It is not a de Polignac number, because 100028885 - 2¹⁸ = 99766741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60287 + ... + 61923.

It is an arithmetic number, because the mean of its divisors is an integer number (5555277).

Almost surely, 2^100028885 is an apocalyptic number.

It is an amenable number.

100028885 is a deficient number, since it is larger than the sum of its proper divisors (33297763).

100028885 is a wasteful number, since it uses less digits than its factorization.

100028885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765 (or 1754 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 100028885 is about 10001.4441457222. Note that the first 3 decimals coincide. The cubic root of 100028885 is about 464.2035698235.

Adding to 100028885 its reverse (588820001), we get a palindrome (688848886).

The spelling of 100028885 in words is "one hundred million, twenty-eight thousand, eight hundred eighty-five".