100555040 has 48 divisors (see below), whose sum is σ = 238956480. Its totient is φ = 39985920.

The previous prime is 100555031. The next prime is 100555061. The reversal of 100555040 is 40555001.

It is a super-2 number, since 2×100555040² = 20222632138803200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26885 + ... + 30395.

It is an arithmetic number, because the mean of its divisors is an integer number (4978260).

Almost surely, 2^100555040 is an apocalyptic number.

100555040 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 100555040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119478240).

100555040 is an abundant number, since it is smaller than the sum of its proper divisors (138401440).

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

100555040 is a wasteful number, since it uses less digits than its factorization.

100555040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3705 (or 3697 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 100555040 is about 10027.7135978248. The cubic root of 100555040 is about 465.0160552517.

The spelling of 100555040 in words is "one hundred million, five hundred fifty-five thousand, forty".