2856809472 has 176 divisors, whose sum is σ = 8797056192. Its totient is φ = 814612480.

The previous prime is 2856809471. The next prime is 2856809477. The reversal of 2856809472 is 2749086582.

It is a tau number, because it is divible by the number of its divisors (176).

It is a super-2 number, since 2×2856809472² = 16322720718617837568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856809471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 571978 + ... + 576950.

Almost surely, 2^2856809472 is an apocalyptic number.

2856809472 is a gapful number since it is divisible by the number (22) 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 2856809472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4398528096).

2856809472 is an abundant number, since it is smaller than the sum of its proper divisors (5940246720).

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

2856809472 is a wasteful number, since it uses less digits than its factorization.

2856809472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5024 (or 5006 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The square root of 2856809472 is about 53449.1297590522. The cubic root of 2856809472 is about 1418.9282185584.

The spelling of 2856809472 in words is "two billion, eight hundred fifty-six million, eight hundred nine thousand, four hundred seventy-two".