68428020 has 48 divisors (see below), whose sum is σ = 193374720. Its totient is φ = 18078336.

The previous prime is 68427977. The next prime is 68428021. The reversal of 68428020 is 2082486.

It is a happy number.

It is a super-2 number, since 2×68428020² = 9364787842240800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68428021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1309 + ... + 11771.

It is an arithmetic number, because the mean of its divisors is an integer number (4028640).

Almost surely, 2^68428020 is an apocalyptic number.

68428020 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 68428020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96687360).

68428020 is an abundant number, since it is smaller than the sum of its proper divisors (124946700).

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

68428020 is a wasteful number, since it uses less digits than its factorization.

68428020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10584 (or 10582 counting only the distinct ones).

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

The square root of 68428020 is about 8272.1230648486. The cubic root of 68428020 is about 409.0201068939.

The spelling of 68428020 in words is "sixty-eight million, four hundred twenty-eight thousand, twenty".