43509942 has 36 divisors (see below), whose sum is σ = 109665036. Its totient is φ = 12431160.

The previous prime is 43509911. The next prime is 43509959. The reversal of 43509942 is 24990534.

It is a junction number, because it is equal to n+sod(n) for n = 43509897 and 43509906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23784 + ... + 25547.

It is an arithmetic number, because the mean of its divisors is an integer number (3046251).

Almost surely, 2^43509942 is an apocalyptic number.

43509942 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

43509942 is an abundant number, since it is smaller than the sum of its proper divisors (66155094).

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

43509942 is a wasteful number, since it uses less digits than its factorization.

43509942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49353 (or 49343 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 43509942 is about 6596.2066371514. The cubic root of 43509942 is about 351.7192740667.

The spelling of 43509942 in words is "forty-three million, five hundred nine thousand, nine hundred forty-two".