2620440787 has 4 divisors (see below), whose sum is σ = 2669883120. Its totient is φ = 2570998456.

The previous prime is 2620440743. The next prime is 2620440811. The reversal of 2620440787 is 7870440262.

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 2620440787 - 2⁷ = 2620440659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2620440287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24721087 + ... + 24721192.

It is an arithmetic number, because the mean of its divisors is an integer number (667470780).

Almost surely, 2^2620440787 is an apocalyptic number.

2620440787 is a deficient number, since it is larger than the sum of its proper divisors (49442333).

2620440787 is an equidigital number, since it uses as much as digits as its factorization.

2620440787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49442332.

The product of its (nonzero) digits is 150528, while the sum is 40.

The square root of 2620440787 is about 51190.2411305124. The cubic root of 2620440787 is about 1378.6629889961.

The spelling of 2620440787 in words is "two billion, six hundred twenty million, four hundred forty thousand, seven hundred eighty-seven".