2026640785 has 16 divisors (see below), whose sum is σ = 2709357840. Its totient is φ = 1444988160.

The previous prime is 2026640753. The next prime is 2026640789. The reversal of 2026640785 is 5870466202.

It can be written as a sum of positive squares in 8 ways, for example, as 337677376 + 1688963409 = 18376^2 + 41097^2 .

It is not a de Polignac number, because 2026640785 - 2⁵ = 2026640753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2026640789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535686 + ... + 539455.

It is an arithmetic number, because the mean of its divisors is an integer number (169334865).

Almost surely, 2^2026640785 is an apocalyptic number.

It is an amenable number.

2026640785 is a deficient number, since it is larger than the sum of its proper divisors (682717055).

2026640785 is a wasteful number, since it uses less digits than its factorization.

2026640785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075188.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 2026640785 is about 45018.2272529694. The cubic root of 2026640785 is about 1265.4906073505.

The spelling of 2026640785 in words is "two billion, twenty-six million, six hundred forty thousand, seven hundred eighty-five".