43400309706 has 64 divisors (see below), whose sum is σ = 104298969600. Its totient is φ = 13298015808.

The previous prime is 43400309677. The next prime is 43400309717. The reversal of 43400309706 is 60790300434.

43400309706 is a `hidden beast` number, since 4 + 340 + 0 + 309 + 7 + 0 + 6 = 666.

43400309706 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38440 + ... + 297116.

It is an arithmetic number, because the mean of its divisors is an integer number (1629671400).

Almost surely, 2^43400309706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43400309706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52149484800).

43400309706 is an abundant number, since it is smaller than the sum of its proper divisors (60898659894).

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

43400309706 is a wasteful number, since it uses less digits than its factorization.

43400309706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258940 (or 258934 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The spelling of 43400309706 in words is "forty-three billion, four hundred million, three hundred nine thousand, seven hundred six".