43720406 has 8 divisors (see below), whose sum is σ = 69032280. Its totient is φ = 20709648.

The previous prime is 43720373. The next prime is 43720423. The reversal of 43720406 is 60402734.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×43720406² = 3822947801609672, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 575231 + ... + 575306.

It is an arithmetic number, because the mean of its divisors is an integer number (8629035).

Almost surely, 2^43720406 is an apocalyptic number.

43720406 is a deficient number, since it is larger than the sum of its proper divisors (25311874).

43720406 is a wasteful number, since it uses less digits than its factorization.

43720406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150558.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 43720406 is about 6612.1408030985. The cubic root of 43720406 is about 352.2854681074.

The spelling of 43720406 in words is "forty-three million, seven hundred twenty thousand, four hundred six".