100723140 has 72 divisors (see below), whose sum is σ = 349177920. Its totient is φ = 23022144.

The previous prime is 100723127. The next prime is 100723163. The reversal of 100723140 is 41327001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38710 + ... + 41229.

Almost surely, 2^100723140 is an apocalyptic number.

100723140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100723140 is an abundant number, since it is smaller than the sum of its proper divisors (248454780).

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

100723140 is a wasteful number, since it uses less digits than its factorization.

100723140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79961 (or 79956 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 100723140 is about 10036.0918688501. The cubic root of 100723140 is about 465.2750367351.

The spelling of 100723140 in words is "one hundred million, seven hundred twenty-three thousand, one hundred forty".