100312440 has 32 divisors (see below), whose sum is σ = 300937680. Its totient is φ = 26749952.

The previous prime is 100312423. The next prime is 100312447. The reversal of 100312440 is 44213001.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100312447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417849 + ... + 418088.

Almost surely, 2^100312440 is an apocalyptic number.

100312440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100312440 is an abundant number, since it is smaller than the sum of its proper divisors (200625240).

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

100312440 is a wasteful number, since it uses less digits than its factorization.

100312440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835951 (or 835947 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 100312440 is about 10015.6098166812. The cubic root of 100312440 is about 464.6417867872.

Adding to 100312440 its reverse (44213001), we get a palindrome (144525441).

The spelling of 100312440 in words is "one hundred million, three hundred twelve thousand, four hundred forty".