2857765536 has 144 divisors (see below), whose sum is σ = 8571981600. Its totient is φ = 936292608.

The previous prime is 2857765517. The next prime is 2857765543. The reversal of 2857765536 is 6355677582.

2857765536 is a `hidden beast` number, since 2 + 8 + 577 + 65 + 5 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 455670 + ... + 461898.

It is an arithmetic number, because the mean of its divisors is an integer number (59527650).

Almost surely, 2^2857765536 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 2857765536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4285990800).

2857765536 is an abundant number, since it is smaller than the sum of its proper divisors (5714216064).

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

2857765536 is an equidigital number, since it uses as much as digits as its factorization.

2857765536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6313 (or 6293 counting only the distinct ones).

The product of its digits is 10584000, while the sum is 54.

The square root of 2857765536 is about 53458.0726925317. The cubic root of 2857765536 is about 1419.0864877625.

The spelling of 2857765536 in words is "two billion, eight hundred fifty-seven million, seven hundred sixty-five thousand, five hundred thirty-six".