100386556 has 12 divisors (see below), whose sum is σ = 181343680. Its totient is φ = 48574080.

The previous prime is 100386551. The next prime is 100386563. The reversal of 100386556 is 655683001.

It is a super-2 number, since 2×100386556² = 20154921251082272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100386551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 404661 + ... + 404908.

Almost surely, 2^100386556 is an apocalyptic number.

It is an amenable number.

100386556 is a deficient number, since it is larger than the sum of its proper divisors (80957124).

100386556 is a wasteful number, since it uses less digits than its factorization.

100386556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809604 (or 809602 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 100386556 is about 10019.3091578212. The cubic root of 100386556 is about 464.7561923809.

It can be divided in two parts, 10038 and 6556, that multiplied together give a triangular number (65809128 = T₁₁₄₇₂).

The spelling of 100386556 in words is "one hundred million, three hundred eighty-six thousand, five hundred fifty-six".