68757280 has 24 divisors (see below), whose sum is σ = 162439452. Its totient is φ = 27502848.

The previous prime is 68757277. The next prime is 68757317. The reversal of 68757280 is 8275786.

68757280 = T₂₇₇ + T₂₇₈ + ... + T₇₅₆.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68757264 + 16 = 8292^2 + 4^2 .

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

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, 214707 + ... + 215026.

Almost surely, 2^68757280 is an apocalyptic number.

It is an amenable number.

68757280 is an abundant number, since it is smaller than the sum of its proper divisors (93682172).

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

68757280 is a wasteful number, since it uses less digits than its factorization.

68757280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429748 (or 429740 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 68757280 is about 8292.0009647853. Note that the first 3 decimals coincide. The cubic root of 68757280 is about 409.6750945690.

The spelling of 68757280 in words is "sixty-eight million, seven hundred fifty-seven thousand, two hundred eighty".