28857143146 has 16 divisors (see below), whose sum is σ = 46732820904. Its totient is φ = 13285128384.

The previous prime is 28857143141. The next prime is 28857143149. The reversal of 28857143146 is 64134175882.

It can be written as a sum of positive squares in 4 ways, for example, as 16579395121 + 12277748025 = 128761^2 + 110805^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28857143146.

It is not an unprimeable number, because it can be changed into a prime (28857143141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1387525 + ... + 1408168.

Almost surely, 2^28857143146 is an apocalyptic number.

28857143146 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28857143146 is a deficient number, since it is larger than the sum of its proper divisors (17875677758).

28857143146 is a wasteful number, since it uses less digits than its factorization.

28857143146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796105.

The product of its digits is 1290240, while the sum is 49.

The spelling of 28857143146 in words is "twenty-eight billion, eight hundred fifty-seven million, one hundred forty-three thousand, one hundred forty-six".