68077480 has 32 divisors (see below), whose sum is σ = 153433800. Its totient is φ = 27184896.

The previous prime is 68077463. The next prime is 68077481. The reversal of 68077480 is 8477086.

It can be written as a sum of positive squares in 4 ways, for example, as 56881764 + 11195716 = 7542^2 + 3346^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (68077481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32134 + ... + 34186.

Almost surely, 2^68077480 is an apocalyptic number.

It is an amenable number.

68077480 is an abundant number, since it is smaller than the sum of its proper divisors (85356320).

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

68077480 is a wasteful number, since it uses less digits than its factorization.

68077480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893 (or 2889 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 68077480 is about 8250.9078288392. The cubic root of 68077480 is about 408.3204742121.

The spelling of 68077480 in words is "sixty-eight million, seventy-seven thousand, four hundred eighty".