100455720 has 128 divisors (see below), whose sum is σ = 333123840. Its totient is φ = 24104960.

The previous prime is 100455709. The next prime is 100455767. The reversal of 100455720 is 27554001.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45850 + ... + 47990.

It is an arithmetic number, because the mean of its divisors is an integer number (2602530).

Almost surely, 2^100455720 is an apocalyptic number.

100455720 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 100455720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166561920).

100455720 is an abundant number, since it is smaller than the sum of its proper divisors (232668120).

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

100455720 is a wasteful number, since it uses less digits than its factorization.

100455720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195 (or 2191 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 100455720 is about 10022.7600988949. The cubic root of 100455720 is about 464.8629032764.

The spelling of 100455720 in words is "one hundred million, four hundred fifty-five thousand, seven hundred twenty".