100401440 has 48 divisors (see below), whose sum is σ = 247520448. Its totient is φ = 38413056.

The previous prime is 100401407. The next prime is 100401487. The reversal of 100401440 is 44104001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9962 + ... + 17321.

It is an arithmetic number, because the mean of its divisors is an integer number (5156676).

Almost surely, 2^100401440 is an apocalyptic number.

100401440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100401440 is an abundant number, since it is smaller than the sum of its proper divisors (147119008).

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

100401440 is a wasteful number, since it uses less digits than its factorization.

100401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27321 (or 27313 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 100401440 is about 10020.0518960732. The cubic root of 100401440 is about 464.7791605604.

Adding to 100401440 its reverse (44104001), we get a palindrome (144505441).

The spelling of 100401440 in words is "one hundred million, four hundred one thousand, four hundred forty".