2785620 has 48 divisors (see below), whose sum is σ = 8261568. Its totient is φ = 698880.

The previous prime is 2785613. The next prime is 2785631. The reversal of 2785620 is 265872.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a d-powerful number, because it can be written as 2⁵ + 7⁷ + 8³ + 5⁹ + 6³ + 2¹³ + 0 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346 + ... + 2385.

It is an arithmetic number, because the mean of its divisors is an integer number (172116).

2^2785620 is an apocalyptic number.

2785620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2785620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4130784).

2785620 is an abundant number, since it is smaller than the sum of its proper divisors (5475948).

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

2785620 is a wasteful number, since it uses less digits than its factorization.

2785620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760 (or 2758 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 2785620 is about 1669.0176751611. The cubic root of 2785620 is about 140.7042743148.

The spelling of 2785620 in words is "two million, seven hundred eighty-five thousand, six hundred twenty".