77280465 has 8 divisors (see below), whose sum is σ = 123648768. Its totient is φ = 41216240.

The previous prime is 77280433. The next prime is 77280491. The reversal of 77280465 is 56408277.

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

It is not a de Polignac number, because 77280465 - 2⁵ = 77280433 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2576001 + ... + 2576030.

It is an arithmetic number, because the mean of its divisors is an integer number (15456096).

Almost surely, 2^77280465 is an apocalyptic number.

It is an amenable number.

77280465 is a deficient number, since it is larger than the sum of its proper divisors (46368303).

77280465 is a wasteful number, since it uses less digits than its factorization.

77280465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5152039.

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 77280465 is about 8790.9308380854. The cubic root of 77280465 is about 425.9479922844.

The spelling of 77280465 in words is "seventy-seven million, two hundred eighty thousand, four hundred sixty-five".