820143598 has 4 divisors (see below), whose sum is σ = 1230215400. Its totient is φ = 410071798.

The previous prime is 820143593. The next prime is 820143613. The reversal of 820143598 is 895341028.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 820143598.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820143593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205035898 + ... + 205035901.

It is an arithmetic number, because the mean of its divisors is an integer number (307553850).

Almost surely, 2^820143598 is an apocalyptic number.

820143598 is a deficient number, since it is larger than the sum of its proper divisors (410071802).

820143598 is a wasteful number, since it uses less digits than its factorization.

820143598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410071801.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 820143598 is about 28638.1493466320. The cubic root of 820143598 is about 936.0447958387.

The spelling of 820143598 in words is "eight hundred twenty million, one hundred forty-three thousand, five hundred ninety-eight".