68392768 has 28 divisors (see below), whose sum is σ = 143702532. Its totient is φ = 32184320.

The previous prime is 68392757. The next prime is 68392771. The reversal of 68392768 is 86729386.

It can be written as a sum of positive squares in 2 ways, for example, as 61591104 + 6801664 = 7848^2 + 2608^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30343 + ... + 32518.

Almost surely, 2^68392768 is an apocalyptic number.

68392768 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

68392768 is an abundant number, since it is smaller than the sum of its proper divisors (75309764).

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

68392768 is a wasteful number, since it uses less digits than its factorization.

68392768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62890 (or 62880 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 68392768 is about 8269.9920193432. The cubic root of 68392768 is about 408.9498566584.

It can be divided in two parts, 68 and 392768, that multiplied together give a square (26708224 = 5168²).

The spelling of 68392768 in words is "sixty-eight million, three hundred ninety-two thousand, seven hundred sixty-eight".