68156280 has 96 divisors (see below), whose sum is σ = 224274960. Its totient is φ = 17948160.

The previous prime is 68156279. The next prime is 68156303. The reversal of 68156280 is 8265186.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28740 + ... + 31020.

Almost surely, 2^68156280 is an apocalyptic number.

68156280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68156280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112137480).

68156280 is an abundant number, since it is smaller than the sum of its proper divisors (156118680).

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

68156280 is a wasteful number, since it uses less digits than its factorization.

68156280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2381 (or 2374 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 68156280 is about 8255.6816799099. The cubic root of 68156280 is about 408.4779577483.

The spelling of 68156280 in words is "sixty-eight million, one hundred fifty-six thousand, two hundred eighty".