857142280 has 32 divisors (see below), whose sum is σ = 1932480000. Its totient is φ = 342161856.

The previous prime is 857142277. The next prime is 857142283. The reversal of 857142280 is 82241758.

It is an interprime number because it is at equal distance from previous prime (857142277) and next prime (857142283).

It is not an unprimeable number, because it can be changed into a prime (857142283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1512 + ... + 41431.

It is an arithmetic number, because the mean of its divisors is an integer number (60390000).

Almost surely, 2^857142280 is an apocalyptic number.

It is an amenable number.

857142280 is an abundant number, since it is smaller than the sum of its proper divisors (1075337720).

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

857142280 is a wasteful number, since it uses less digits than its factorization.

857142280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43453 (or 43449 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 857142280 is about 29276.9923318636. The cubic root of 857142280 is about 949.9140383900.

The spelling of 857142280 in words is "eight hundred fifty-seven million, one hundred forty-two thousand, two hundred eighty".