84257998 has 16 divisors (see below), whose sum is σ = 139100976. Its totient is φ = 37959040.

The previous prime is 84257909. The next prime is 84258007. The reversal of 84257998 is 89975248.

It is a congruent number.

It is an unprimeable number.

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, 14461 + ... + 19432.

It is an arithmetic number, because the mean of its divisors is an integer number (8693811).

Almost surely, 2^84257998 is an apocalyptic number.

84257998 is a deficient number, since it is larger than the sum of its proper divisors (54842978).

84257998 is a wasteful number, since it uses less digits than its factorization.

84257998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34019.

The product of its digits is 1451520, while the sum is 52.

The square root of 84257998 is about 9179.2155438251. The cubic root of 84257998 is about 438.3998315873.

The spelling of 84257998 in words is "eighty-four million, two hundred fifty-seven thousand, nine hundred ninety-eight".