43631890440 has 64 divisors (see below), whose sum is σ = 132366441600. Its totient is φ = 11504435712.

The previous prime is 43631890427. The next prime is 43631890553. The reversal of 43631890440 is 4409813634.

It is a junction number, because it is equal to n+sod(n) for n = 43631890392 and 43631890401.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2032012 + ... + 2053371.

It is an arithmetic number, because the mean of its divisors is an integer number (2068225650).

Almost surely, 2^43631890440 is an apocalyptic number.

43631890440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43631890440 is an abundant number, since it is smaller than the sum of its proper divisors (88734551160).

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

43631890440 is a wasteful number, since it uses less digits than its factorization.

43631890440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4085486 (or 4085482 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 42.

The spelling of 43631890440 in words is "forty-three billion, six hundred thirty-one million, eight hundred ninety thousand, four hundred forty".