85001998 has 16 divisors (see below), whose sum is σ = 129163104. Its totient is φ = 41951520.

The previous prime is 85001963. The next prime is 85001999. The reversal of 85001998 is 89910058.

It is a self number, because there is not a number n which added to its sum of digits gives 85001998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85001999) 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, 51628 + ... + 53248.

It is an arithmetic number, because the mean of its divisors is an integer number (8072694).

Almost surely, 2^85001998 is an apocalyptic number.

85001998 is a deficient number, since it is larger than the sum of its proper divisors (44161106).

85001998 is a wasteful number, since it uses less digits than its factorization.

85001998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1947.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 85001998 is about 9219.6528134198. The cubic root of 85001998 is about 439.6864122342.

The spelling of 85001998 in words is "eighty-five million, one thousand, nine hundred ninety-eight".