100040644 has 12 divisors (see below), whose sum is σ = 190986768. Its totient is φ = 45473000.

The previous prime is 100040641. The next prime is 100040653. The reversal of 100040644 is 446040001.

It is not an unprimeable number, because it can be changed into a prime (100040641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136782 + ... + 1136869.

It is an arithmetic number, because the mean of its divisors is an integer number (15915564).

Almost surely, 2^100040644 is an apocalyptic number.

It is an amenable number.

100040644 is a deficient number, since it is larger than the sum of its proper divisors (90946124).

100040644 is a wasteful number, since it uses less digits than its factorization.

100040644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273666 (or 2273664 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 100040644 is about 10002.0319935501. The cubic root of 100040644 is about 464.2217590892.

Adding to 100040644 its reverse (446040001), we get a palindrome (546080645).

The spelling of 100040644 in words is "one hundred million, forty thousand, six hundred forty-four".