68720384 has 18 divisors (see below), whose sum is σ = 137172840. Its totient is φ = 34360064.

The previous prime is 68720369. The next prime is 68720411. The reversal of 68720384 is 48302786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133964 + ... + 134475.

Almost surely, 2^68720384 is an apocalyptic number.

68720384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

68720384 is a deficient number, since it is larger than the sum of its proper divisors (68452456).

68720384 is an equidigital number, since it uses as much as digits as its factorization.

68720384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268455 (or 268441 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 68720384 is about 8289.7758715179. The cubic root of 68720384 is about 409.6018025637.

The spelling of 68720384 in words is "sixty-eight million, seven hundred twenty thousand, three hundred eighty-four".