2690240385 has 24 divisors (see below), whose sum is σ = 5007142656. Its totient is φ = 1229823840.

The previous prime is 2690240383. The next prime is 2690240401. The reversal of 2690240385 is 5830420962.

It is a happy number.

It is not a de Polignac number, because 2690240385 - 2¹ = 2690240383 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2690240383) 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, 1829361 + ... + 1830830.

It is an arithmetic number, because the mean of its divisors is an integer number (208630944).

Almost surely, 2^2690240385 is an apocalyptic number.

It is an amenable number.

2690240385 is a deficient number, since it is larger than the sum of its proper divisors (2316902271).

2690240385 is a wasteful number, since it uses less digits than its factorization.

2690240385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660213 (or 3660206 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 2690240385 is about 51867.5272689956. The cubic root of 2690240385 is about 1390.7968422478.

The spelling of 2690240385 in words is "two billion, six hundred ninety million, two hundred forty thousand, three hundred eighty-five".