835138815 has 32 divisors (see below), whose sum is σ = 1528367616. Its totient is φ = 381463680.

The previous prime is 835138807. The next prime is 835138823. The reversal of 835138815 is 518831538.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (835138807) and next prime (835138823).

It is not a de Polignac number, because 835138815 - 2³ = 835138807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166900 + ... + 171830.

It is an arithmetic number, because the mean of its divisors is an integer number (47761488).

Almost surely, 2^835138815 is an apocalyptic number.

835138815 is a deficient number, since it is larger than the sum of its proper divisors (693228801).

835138815 is a wasteful number, since it uses less digits than its factorization.

835138815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6559.

The product of its digits is 115200, while the sum is 42.

The square root of 835138815 is about 28898.7683993626. The cubic root of 835138815 is about 941.7151479812.

The spelling of 835138815 in words is "eight hundred thirty-five million, one hundred thirty-eight thousand, eight hundred fifteen".