68409510 has 96 divisors (see below), whose sum is σ = 180880128. Its totient is φ = 16548480.

The previous prime is 68409503. The next prime is 68409527. The reversal of 68409510 is 1590486.

It is a super-2 number, since 2×68409510² = 9359722116880200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 522145 + ... + 522275.

It is an arithmetic number, because the mean of its divisors is an integer number (1884168).

Almost surely, 2^68409510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68409510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90440064).

68409510 is an abundant number, since it is smaller than the sum of its proper divisors (112470618).

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

68409510 is a wasteful number, since it uses less digits than its factorization.

68409510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 68409510 is about 8271.0041711995. The cubic root of 68409510 is about 408.9832231488.

Adding to 68409510 its reverse (1590486), we get a palindrome (69999996).

The spelling of 68409510 in words is "sixty-eight million, four hundred nine thousand, five hundred ten".