2805390 has 96 divisors (see below), whose sum is σ = 8588736. Its totient is φ = 622080.

The previous prime is 2805389. The next prime is 2805403. The reversal of 2805390 is 935082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38394 + ... + 38466.

It is an arithmetic number, because the mean of its divisors is an integer number (89466).

2^2805390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2805390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4294368).

2805390 is an abundant number, since it is smaller than the sum of its proper divisors (5783346).

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

2805390 is a wasteful number, since it uses less digits than its factorization.

2805390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 151 counting only the distinct ones).

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

The square root of 2805390 is about 1674.9298492773. The cubic root of 2805390 is about 141.0363570045.

The spelling of 2805390 in words is "two million, eight hundred five thousand, three hundred ninety".