100861800 has 192 divisors, whose sum is σ = 343519680. Its totient is φ = 24330240.

The previous prime is 100861793. The next prime is 100861801. The reversal of 100861800 is 8168001.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (100861801) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 522504 + ... + 522696.

It is an arithmetic number, because the mean of its divisors is an integer number (1789165).

Almost surely, 2^100861800 is an apocalyptic number.

100861800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100861800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171759840).

100861800 is an abundant number, since it is smaller than the sum of its proper divisors (242657880).

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

100861800 is a wasteful number, since it uses less digits than its factorization.

100861800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 100861800 is about 10042.9975604896. The cubic root of 100861800 is about 465.4884450093.

The spelling of 100861800 in words is "one hundred million, eight hundred sixty-one thousand, eight hundred".