100228609 has 8 divisors (see below), whose sum is σ = 108018792. Its totient is φ = 92449920.

The previous prime is 100228607. The next prime is 100228613. The reversal of 100228609 is 906822001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2772225 + 97456384 = 1665^2 + 9872^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100228609 - 2¹ = 100228607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100228607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26199 + ... + 29779.

It is an arithmetic number, because the mean of its divisors is an integer number (13502349).

Almost surely, 2^100228609 is an apocalyptic number.

It is an amenable number.

100228609 is a deficient number, since it is larger than the sum of its proper divisors (7790183).

100228609 is a wasteful number, since it uses less digits than its factorization.

100228609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5747.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 100228609 is about 10011.4239246972. The cubic root of 100228609 is about 464.5123171647.

The spelling of 100228609 in words is "one hundred million, two hundred twenty-eight thousand, six hundred nine".