40720283 has 4 divisors (see below), whose sum is σ = 41586720. Its totient is φ = 39853848.

The previous prime is 40720279. The next prime is 40720291. The reversal of 40720283 is 38202704.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40720283 - 2² = 40720279 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40720223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433148 + ... + 433241.

It is an arithmetic number, because the mean of its divisors is an integer number (10396680).

Almost surely, 2^40720283 is an apocalyptic number.

40720283 is a deficient number, since it is larger than the sum of its proper divisors (866437).

40720283 is an equidigital number, since it uses as much as digits as its factorization.

40720283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866436.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 40720283 is about 6381.2446278136. The cubic root of 40720283 is about 344.0357673059.

Adding to 40720283 its reverse (38202704), we get a palindrome (78922987).

The spelling of 40720283 in words is "forty million, seven hundred twenty thousand, two hundred eighty-three".