2856349440 has 288 divisors, whose sum is σ = 11585064960. Its totient is φ = 652824576.

The previous prime is 2856349429. The next prime is 2856349459. The reversal of 2856349440 is 449436582.

2856349440 is a `hidden beast` number, since 2 + 8 + 5 + 634 + 9 + 4 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236017 + ... + 247823.

It is an arithmetic number, because the mean of its divisors is an integer number (40225920).

Almost surely, 2^2856349440 is an apocalyptic number.

2856349440 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 2856349440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5792532480).

2856349440 is an abundant number, since it is smaller than the sum of its proper divisors (8728715520).

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

2856349440 is a wasteful number, since it uses less digits than its factorization.

2856349440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11844 (or 11824 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The square root of 2856349440 is about 53444.8261293832. The cubic root of 2856349440 is about 1418.8520511377.

The spelling of 2856349440 in words is "two billion, eight hundred fifty-six million, three hundred forty-nine thousand, four hundred forty".