43631040 has 112 divisors (see below), whose sum is σ = 141622272. Its totient is φ = 11375616.

The previous prime is 43630999. The next prime is 43631041. The reversal of 43631040 is 4013634.

It is a junction number, because it is equal to n+sod(n) for n = 43630998 and 43631016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43631041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44637 + ... + 45603.

Almost surely, 2^43631040 is an apocalyptic number.

43631040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43631040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70811136).

43631040 is an abundant number, since it is smaller than the sum of its proper divisors (97991232).

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

43631040 is a wasteful number, since it uses less digits than its factorization.

43631040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 43631040 is about 6605.3796257293. The cubic root of 43631040 is about 352.0452765451.

Adding to 43631040 its reverse (4013634), we get a palindrome (47644674).

The spelling of 43631040 in words is "forty-three million, six hundred thirty-one thousand, forty".