40720433 has 8 divisors (see below), whose sum is σ = 44189376. Its totient is φ = 37299600.

The previous prime is 40720429. The next prime is 40720447. The reversal of 40720433 is 33402704.

It is a happy number.

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

It is not a de Polignac number, because 40720433 - 2² = 40720429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40720399 and 40720408.

It is not an unprimeable number, because it can be changed into a prime (40720033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10253 + ... + 13658.

It is an arithmetic number, because the mean of its divisors is an integer number (5523672).

Almost surely, 2^40720433 is an apocalyptic number.

It is an amenable number.

40720433 is a deficient number, since it is larger than the sum of its proper divisors (3468943).

40720433 is a wasteful number, since it uses less digits than its factorization.

40720433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24055.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 40720433 is about 6381.2563809958. The cubic root of 40720433 is about 344.0361897432.

The spelling of 40720433 in words is "forty million, seven hundred twenty thousand, four hundred thirty-three".