2890391265 has 24 divisors (see below), whose sum is σ = 5020337088. Its totient is φ = 1538364960.

The previous prime is 2890391263. The next prime is 2890391279. The reversal of 2890391265 is 5621930982.

It is not a de Polignac number, because 2890391265 - 2¹ = 2890391263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2890391265.

It is not an unprimeable number, because it can be changed into a prime (2890391261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44031 + ... + 87860.

It is an arithmetic number, because the mean of its divisors is an integer number (209180712).

Almost surely, 2^2890391265 is an apocalyptic number.

It is an amenable number.

2890391265 is a deficient number, since it is larger than the sum of its proper divisors (2129945823).

2890391265 is a wasteful number, since it uses less digits than its factorization.

2890391265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132389 (or 132386 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 2890391265 is about 53762.3591837263. The cubic root of 2890391265 is about 1424.4664077925.

The spelling of 2890391265 in words is "two billion, eight hundred ninety million, three hundred ninety-one thousand, two hundred sixty-five".