100140640 has 48 divisors (see below), whose sum is σ = 249041520. Its totient is φ = 37946880.

The previous prime is 100140629. The next prime is 100140647. The reversal of 100140640 is 46041001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100140647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13431 + ... + 19510.

It is an arithmetic number, because the mean of its divisors is an integer number (5188365).

Almost surely, 2^100140640 is an apocalyptic number.

100140640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100140640 is an abundant number, since it is smaller than the sum of its proper divisors (148900880).

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

100140640 is a wasteful number, since it uses less digits than its factorization.

100140640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32975 (or 32967 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 100140640 is about 10007.0295292859. The cubic root of 100140640 is about 464.3763791156.

Adding to 100140640 its reverse (46041001), we get a palindrome (146181641).

The spelling of 100140640 in words is "one hundred million, one hundred forty thousand, six hundred forty".