68158436 has 24 divisors (see below), whose sum is σ = 121605624. Its totient is φ = 33420800.

The previous prime is 68158427. The next prime is 68158471. The reversal of 68158436 is 63485186.

It can be written as a sum of positive squares in 4 ways, for example, as 19855936 + 48302500 = 4456^2 + 6950^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68158393 and 68158402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44906 + ... + 46398.

It is an arithmetic number, because the mean of its divisors is an integer number (5066901).

Almost surely, 2^68158436 is an apocalyptic number.

It is an amenable number.

68158436 is a deficient number, since it is larger than the sum of its proper divisors (53447188).

68158436 is a wasteful number, since it uses less digits than its factorization.

68158436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1711 (or 1709 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 68158436 is about 8255.8122556173. The cubic root of 68158436 is about 408.4822648554.

It can be divided in two parts, 6815 and 8436, that added together give a palindrome (15251).

The spelling of 68158436 in words is "sixty-eight million, one hundred fifty-eight thousand, four hundred thirty-six".