68829915 has 64 divisors (see below), whose sum is σ = 143327232. Its totient is φ = 27350400.

The previous prime is 68829911. The next prime is 68829947. The reversal of 68829915 is 51992886.

It is a happy number.

It is not a de Polignac number, because 68829915 - 2² = 68829911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68829911) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25270 + ... + 27860.

It is an arithmetic number, because the mean of its divisors is an integer number (2239488).

Almost surely, 2^68829915 is an apocalyptic number.

68829915 is an abundant number, since it is smaller than the sum of its proper divisors (74497317).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68829915 is a wasteful number, since it uses less digits than its factorization.

68829915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640.

The product of its digits is 311040, while the sum is 48.

The square root of 68829915 is about 8296.3796321046. The cubic root of 68829915 is about 409.8193036783.

It can be divided in two parts, 688 and 29915, that added together give a palindrome (30603).

The spelling of 68829915 in words is "sixty-eight million, eight hundred twenty-nine thousand, nine hundred fifteen".