100722720 has 192 divisors, whose sum is σ = 374685696. Its totient is φ = 22256640.

The previous prime is 100722719. The next prime is 100722733. The reversal of 100722720 is 27227001.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 103677 + ... + 104643.

It is an arithmetic number, because the mean of its divisors is an integer number (1951488).

Almost surely, 2^100722720 is an apocalyptic number.

100722720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100722720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187342848).

100722720 is an abundant number, since it is smaller than the sum of its proper divisors (273962976).

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

100722720 is a wasteful number, since it uses less digits than its factorization.

100722720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 100722720 is about 10036.0709443487. The cubic root of 100722720 is about 465.2743900257.

Adding to 100722720 its reverse (27227001), we get a palindrome (127949721).

The spelling of 100722720 in words is "one hundred million, seven hundred twenty-two thousand, seven hundred twenty".