100646540 has 24 divisors (see below), whose sum is σ = 213736320. Its totient is φ = 39805568.

The previous prime is 100646527. The next prime is 100646543. The reversal of 100646540 is 45646001.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (100646543) 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 7 ways as a sum of consecutive naturals, for example, 26492 + ... + 30051.

It is an arithmetic number, because the mean of its divisors is an integer number (8905680).

Almost surely, 2^100646540 is an apocalyptic number.

100646540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100646540 is an abundant number, since it is smaller than the sum of its proper divisors (113089780).

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

100646540 is a wasteful number, since it uses less digits than its factorization.

100646540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56641 (or 56639 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 100646540 is about 10032.2749164883. The cubic root of 100646540 is about 465.1570595209.

The spelling of 100646540 in words is "one hundred million, six hundred forty-six thousand, five hundred forty".