2899945 has 16 divisors (see below), whose sum is σ = 3730320. Its totient is φ = 2156544.

The previous prime is 2899943. The next prime is 2899991. The reversal of 2899945 is 5499982.

It can be written as a sum of positive squares in 8 ways, for example, as 87616 + 2812329 = 296^2 + 1677^2 .

It is a cyclic number.

It is not a de Polignac number, because 2899945 - 2¹ = 2899943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2899895 and 2899904.

It is not an unprimeable number, because it can be changed into a prime (2899943) 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, 9109 + ... + 9421.

It is an arithmetic number, because the mean of its divisors is an integer number (233145).

2^2899945 is an apocalyptic number.

It is an amenable number.

2899945 is a deficient number, since it is larger than the sum of its proper divisors (830375).

2899945 is a wasteful number, since it uses less digits than its factorization.

2899945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444.

The product of its digits is 233280, while the sum is 46.

The square root of 2899945 is about 1702.9224879600. The cubic root of 2899945 is about 142.6034131870.

It can be divided in two parts, 2899 and 945, that added together give a square (3844 = 62²).

The spelling of 2899945 in words is "two million, eight hundred ninety-nine thousand, nine hundred forty-five".