820038535 has 8 divisors (see below), whose sum is σ = 986386176. Its totient is φ = 654470880.

The previous prime is 820038533. The next prime is 820038547. The reversal of 820038535 is 535830028.

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

It is not a de Polignac number, because 820038535 - 2¹ = 820038533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 820038535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820038533) 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, 192679 + ... + 196888.

It is an arithmetic number, because the mean of its divisors is an integer number (123298272).

Almost surely, 2^820038535 is an apocalyptic number.

820038535 is a deficient number, since it is larger than the sum of its proper divisors (166347641).

820038535 is a wasteful number, since it uses less digits than its factorization.

820038535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389993.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 820038535 is about 28636.3149689341. The cubic root of 820038535 is about 936.0048240279.

The spelling of 820038535 in words is "eight hundred twenty million, thirty-eight thousand, five hundred thirty-five".