10043840 has 28 divisors (see below), whose sum is σ = 23917656. Its totient is φ = 4017408.

The previous prime is 10043809. The next prime is 10043843. The reversal of 10043840 is 4834001.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10043843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15374 + ... + 16013.

It is an arithmetic number, because the mean of its divisors is an integer number (854202).

Almost surely, 2^10043840 is an apocalyptic number.

10043840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10043840 is an abundant number, since it is smaller than the sum of its proper divisors (13873816).

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

10043840 is an equidigital number, since it uses as much as digits as its factorization.

10043840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31404 (or 31394 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 10043840 is about 3169.2017922499. The cubic root of 10043840 is about 215.7578447647.

Adding to 10043840 its reverse (4834001), we get a palindrome (14877841).

The spelling of 10043840 in words is "ten million, forty-three thousand, eight hundred forty".