2945890 has 16 divisors (see below), whose sum is σ = 5359032. Its totient is φ = 1165824.

The previous prime is 2945869. The next prime is 2945933. The reversal of 2945890 is 985492.

It can be written as a sum of positive squares in 4 ways, for example, as 2692881 + 253009 = 1641^2 + 503^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549 + ... + 2488.

2^2945890 is an apocalyptic number.

2945890 is a deficient number, since it is larger than the sum of its proper divisors (2413142).

2945890 is a wasteful number, since it uses less digits than its factorization.

2945890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 2945890 is about 1716.3595194481. The cubic root of 2945890 is about 143.3525783906.

The spelling of 2945890 in words is "two million, nine hundred forty-five thousand, eight hundred ninety".