68402280 has 96 divisors (see below), whose sum is σ = 216712800. Its totient is φ = 17269632.

The previous prime is 68402267. The next prime is 68402281. The reversal of 68402280 is 8220486.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (68402281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42531 + ... + 44109.

It is an arithmetic number, because the mean of its divisors is an integer number (2257425).

Almost surely, 2^68402280 is an apocalyptic number.

68402280 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 68402280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108356400).

68402280 is an abundant number, since it is smaller than the sum of its proper divisors (148310520).

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

68402280 is a wasteful number, since it uses less digits than its factorization.

68402280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1631 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 68402280 is about 8270.5670905930. The cubic root of 68402280 is about 408.9688145630.

The spelling of 68402280 in words is "sixty-eight million, four hundred two thousand, two hundred eighty".