2785640528 has 40 divisors (see below), whose sum is σ = 5909190240. Its totient is φ = 1261607040.

The previous prime is 2785640489. The next prime is 2785640531. The reversal of 2785640528 is 8250465872.

It is a super-2 number, since 2×2785640528² = 15519586302472237568, which contains 22 as substring.

It is a congruent number.

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, 20183 + ... + 77321.

It is an arithmetic number, because the mean of its divisors is an integer number (147729756).

Almost surely, 2^2785640528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2785640528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2954595120).

2785640528 is an abundant number, since it is smaller than the sum of its proper divisors (3123549712).

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

2785640528 is a wasteful number, since it uses less digits than its factorization.

2785640528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57435 (or 57429 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 47.

The square root of 2785640528 is about 52779.1675569064. The cubic root of 2785640528 is about 1407.0461994341.

The spelling of 2785640528 in words is "two billion, seven hundred eighty-five million, six hundred forty thousand, five hundred twenty-eight".