100442690 has 8 divisors (see below), whose sum is σ = 180796860. Its totient is φ = 40177072.

The previous prime is 100442687. The next prime is 100442707. The reversal of 100442690 is 96244001.

It can be written as a sum of positive squares in 2 ways, for example, as 99940009 + 502681 = 9997^2 + 709^2 .

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

It is a super-2 number, since 2×100442690² = 20177467948872200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5022125 + ... + 5022144.

Almost surely, 2^100442690 is an apocalyptic number.

100442690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100442690 is a deficient number, since it is larger than the sum of its proper divisors (80354170).

100442690 is a wasteful number, since it uses less digits than its factorization.

100442690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10044276.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 100442690 is about 10022.1100572684. The cubic root of 100442690 is about 464.8428034569.

Adding to 100442690 its reverse (96244001), we get a palindrome (196686691).

The spelling of 100442690 in words is "one hundred million, four hundred forty-two thousand, six hundred ninety".