100640992 has 24 divisors (see below), whose sum is σ = 200185776. Its totient is φ = 49800192.

The previous prime is 100640989. The next prime is 100641001. The reversal of 100640992 is 299046001.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13108 + ... + 19315.

It is an arithmetic number, because the mean of its divisors is an integer number (8341074).

Almost surely, 2^100640992 is an apocalyptic number.

It is an amenable number.

100640992 is a deficient number, since it is larger than the sum of its proper divisors (99544784).

100640992 is an equidigital number, since it uses as much as digits as its factorization.

100640992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32530 (or 32522 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 100640992 is about 10031.9984051035. The cubic root of 100640992 is about 465.1485123193.

Adding to 100640992 its reverse (299046001), we get a palindrome (399686993).

The spelling of 100640992 in words is "one hundred million, six hundred forty thousand, nine hundred ninety-two".