2905890 has 32 divisors (see below), whose sum is σ = 7511616. Its totient is φ = 715200.

The previous prime is 2905867. The next prime is 2905891. The reversal of 2905890 is 985092.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2905891) 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, 3336 + ... + 4115.

It is an arithmetic number, because the mean of its divisors is an integer number (234738).

2^2905890 is an apocalyptic number.

2905890 is an abundant number, since it is smaller than the sum of its proper divisors (4605726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2905890 is a wasteful number, since it uses less digits than its factorization.

2905890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7474.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 2905890 is about 1704.6671229305. The cubic root of 2905890 is about 142.7007941862.

The spelling of 2905890 in words is "two million, nine hundred five thousand, eight hundred ninety".