2905830 has 48 divisors (see below), whose sum is σ = 7665840. Its totient is φ = 763584.

The previous prime is 2905823. The next prime is 2905853. The reversal of 2905830 is 385092.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2905794 and 2905803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7276 + ... + 7664.

It is an arithmetic number, because the mean of its divisors is an integer number (159705).

2^2905830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2905830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3832920).

2905830 is an abundant number, since it is smaller than the sum of its proper divisors (4760010).

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

2905830 is a wasteful number, since it uses less digits than its factorization.

2905830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2905830 is about 1704.6495240958. The cubic root of 2905830 is about 142.6998120308.

The spelling of 2905830 in words is "two million, nine hundred five thousand, eight hundred thirty".