43446461840 has 20 divisors (see below), whose sum is σ = 101013023964. Its totient is φ = 17378584704.

The previous prime is 43446461833. The next prime is 43446461843. The reversal of 43446461840 is 4816464434.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20046029056 + 23400432784 = 141584^2 + 152972^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 43446461791 and 43446461800.

It is not an unprimeable number, because it can be changed into a prime (43446461843) 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, 271540307 + ... + 271540466.

Almost surely, 2^43446461840 is an apocalyptic number.

43446461840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43446461840 is an abundant number, since it is smaller than the sum of its proper divisors (57566562124).

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

43446461840 is a wasteful number, since it uses less digits than its factorization.

43446461840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543080786 (or 543080780 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 44.

The spelling of 43446461840 in words is "forty-three billion, four hundred forty-six million, four hundred sixty-one thousand, eight hundred forty".