43209761940 has 72 divisors (see below), whose sum is σ = 133025911200. Its totient is φ = 11350620864.

The previous prime is 43209761899. The next prime is 43209761971. The reversal of 43209761940 is 4916790234.

It is a happy number.

43209761940 is a `hidden beast` number, since 4 + 3 + 20 + 9 + 7 + 619 + 4 + 0 = 666.

It is a super-2 number, since 2×43209761940² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1779390 + ... + 1803509.

It is an arithmetic number, because the mean of its divisors is an integer number (1847582100).

Almost surely, 2^43209761940 is an apocalyptic number.

It is an amenable number.

43209761940 is an abundant number, since it is smaller than the sum of its proper divisors (89816149260).

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

43209761940 is a wasteful number, since it uses less digits than its factorization.

43209761940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582981 (or 3582976 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 43209761940 in words is "forty-three billion, two hundred nine million, seven hundred sixty-one thousand, nine hundred forty".