84028857 has 8 divisors (see below), whose sum is σ = 122223840. Its totient is φ = 50926560.

The previous prime is 84028843. The next prime is 84028871. The reversal of 84028857 is 75882048.

It is an interprime number because it is at equal distance from previous prime (84028843) and next prime (84028871).

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

It is not a de Polignac number, because 84028857 - 2⁸ = 84028601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (84028757) 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, 1273132 + ... + 1273197.

It is an arithmetic number, because the mean of its divisors is an integer number (15277980).

Almost surely, 2^84028857 is an apocalyptic number.

It is an amenable number.

84028857 is a deficient number, since it is larger than the sum of its proper divisors (38194983).

84028857 is a wasteful number, since it uses less digits than its factorization.

84028857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546343.

The product of its (nonzero) digits is 143360, while the sum is 42.

The square root of 84028857 is about 9166.7255331443. The cubic root of 84028857 is about 438.0020589549.

The spelling of 84028857 in words is "eighty-four million, twenty-eight thousand, eight hundred fifty-seven".