43780879640 has 32 divisors (see below), whose sum is σ = 101684626560. Its totient is φ = 16947436800.

The previous prime is 43780879631. The next prime is 43780879657. The reversal of 43780879640 is 4697808734.

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, 17652341 + ... + 17654820.

It is an arithmetic number, because the mean of its divisors is an integer number (3177644580).

Almost surely, 2^43780879640 is an apocalyptic number.

43780879640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43780879640 is an abundant number, since it is smaller than the sum of its proper divisors (57903746920).

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

43780879640 is a wasteful number, since it uses less digits than its factorization.

43780879640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35307203 (or 35307199 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 56.

The spelling of 43780879640 in words is "forty-three billion, seven hundred eighty million, eight hundred seventy-nine thousand, six hundred forty".