100435998 has 32 divisors (see below), whose sum is σ = 216720000. Its totient is φ = 30846816.

The previous prime is 100435991. The next prime is 100435999. The reversal of 100435998 is 899534001.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100435991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66253 + ... + 67751.

It is an arithmetic number, because the mean of its divisors is an integer number (6772500).

Almost surely, 2^100435998 is an apocalyptic number.

100435998 is an abundant number, since it is smaller than the sum of its proper divisors (116284002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100435998 is a wasteful number, since it uses less digits than its factorization.

100435998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 100435998 is about 10021.7761898777. The cubic root of 100435998 is about 464.8324798348.

Adding to 100435998 its reverse (899534001), we get a palindrome (999969999).

The spelling of 100435998 in words is "one hundred million, four hundred thirty-five thousand, nine hundred ninety-eight".