2785873428 has 36 divisors (see below), whose sum is σ = 7583767828. Its totient is φ = 857191680.

The previous prime is 2785873427. The next prime is 2785873439. The reversal of 2785873428 is 8243785872.

2785873428 is a `hidden beast` number, since 2 + 7 + 8 + 587 + 34 + 28 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1438836624 + 1347036804 = 37932^2 + 36702^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×2785873428² = 15522181513672942368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2785873421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2975893 + ... + 2976828.

Almost surely, 2^2785873428 is an apocalyptic number.

It is an amenable number.

2785873428 is an abundant number, since it is smaller than the sum of its proper divisors (4797894400).

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

2785873428 is a wasteful number, since it uses less digits than its factorization.

2785873428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5952744 (or 5952739 counting only the distinct ones).

The product of its digits is 6021120, while the sum is 54.

The square root of 2785873428 is about 52781.3738737445. The cubic root of 2785873428 is about 1407.0854114722.

The spelling of 2785873428 in words is "two billion, seven hundred eighty-five million, eight hundred seventy-three thousand, four hundred twenty-eight".