77280338 has 8 divisors (see below), whose sum is σ = 116017932. Its totient is φ = 38607696.

The previous prime is 77280337. The next prime is 77280347. The reversal of 77280338 is 83308277.

It can be written as a sum of positive squares in 2 ways, for example, as 68178049 + 9102289 = 8257^2 + 3017^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (77280337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13145 + ... + 18092.

Almost surely, 2^77280338 is an apocalyptic number.

77280338 is a deficient number, since it is larger than the sum of its proper divisors (38737594).

77280338 is a wasteful number, since it uses less digits than its factorization.

77280338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32476.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 77280338 is about 8790.9236147290. The cubic root of 77280338 is about 425.9477589549.

The spelling of 77280338 in words is "seventy-seven million, two hundred eighty thousand, three hundred thirty-eight".