100640730 has 32 divisors (see below), whose sum is σ = 249868800. Its totient is φ = 25911872.

The previous prime is 100640719. The next prime is 100640747. The reversal of 100640730 is 37046001.

It is a junction number, because it is equal to n+sod(n) for n = 100640697 and 100640706.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56970 + ... + 58709.

It is an arithmetic number, because the mean of its divisors is an integer number (7808400).

Almost surely, 2^100640730 is an apocalyptic number.

100640730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100640730 is an abundant number, since it is smaller than the sum of its proper divisors (149228070).

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

100640730 is a wasteful number, since it uses less digits than its factorization.

100640730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115718.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 100640730 is about 10031.9853468793. The cubic root of 100640730 is about 465.1481086766.

Adding to 100640730 its reverse (37046001), we get a palindrome (137686731).

The spelling of 100640730 in words is "one hundred million, six hundred forty thousand, seven hundred thirty".