100020440 has 32 divisors (see below), whose sum is σ = 242358480. Its totient is φ = 36930432.

The previous prime is 100020413. The next prime is 100020457. The reversal of 100020440 is 44020001.

It is a congruent number.

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, 95654 + ... + 96693.

Almost surely, 2^100020440 is an apocalyptic number.

100020440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100020440 is an abundant number, since it is smaller than the sum of its proper divisors (142338040).

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

100020440 is a wasteful number, since it uses less digits than its factorization.

100020440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192371 (or 192367 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 100020440 is about 10001.0219477811. The cubic root of 100020440 is about 464.1905058987.

Adding to 100020440 its reverse (44020001), we get a palindrome (144040441).

The spelling of 100020440 in words is "one hundred million, twenty thousand, four hundred forty".