40720879 has 12 divisors (see below), whose sum is σ = 43176816. Its totient is φ = 38331392.

The previous prime is 40720861. The next prime is 40720903. The reversal of 40720879 is 97802704.

It is a happy number.

It is not a de Polignac number, because 40720879 - 2⁷ = 40720751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40720829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158319 + ... + 158575.

It is an arithmetic number, because the mean of its divisors is an integer number (3598068).

Almost surely, 2^40720879 is an apocalyptic number.

40720879 is a deficient number, since it is larger than the sum of its proper divisors (2455937).

40720879 is an equidigital number, since it uses as much as digits as its factorization.

40720879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 40720879 is about 6381.2913269964. The cubic root of 40720879 is about 344.0374457840.

The spelling of 40720879 in words is "forty million, seven hundred twenty thousand, eight hundred seventy-nine".