2857721494 has 8 divisors (see below), whose sum is σ = 4287091248. Its totient is φ = 1428691080.

The previous prime is 2857721491. The next prime is 2857721533. The reversal of 2857721494 is 4941277582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857721491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62617 + ... + 98164.

It is an arithmetic number, because the mean of its divisors is an integer number (535886406).

Almost surely, 2^2857721494 is an apocalyptic number.

2857721494 is a deficient number, since it is larger than the sum of its proper divisors (1429369754).

2857721494 is a wasteful number, since it uses less digits than its factorization.

2857721494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169670.

The product of its digits is 1128960, while the sum is 49.

The square root of 2857721494 is about 53457.6607606431. The cubic root of 2857721494 is about 1419.0791977163.

The spelling of 2857721494 in words is "two billion, eight hundred fifty-seven million, seven hundred twenty-one thousand, four hundred ninety-four".