77480489 has 12 divisors (see below), whose sum is σ = 80846220. Its totient is φ = 74249280.

The previous prime is 77480477. The next prime is 77480497. The reversal of 77480489 is 98408477.

It can be written as a sum of positive squares in 6 ways, for example, as 1651225 + 75829264 = 1285^2 + 8708^2 .

It is a de Polignac number, because none of the positive numbers 2^k-77480489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77480449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 151967 + ... + 152475.

It is an arithmetic number, because the mean of its divisors is an integer number (6737185).

Almost surely, 2^77480489 is an apocalyptic number.

It is an amenable number.

77480489 is a deficient number, since it is larger than the sum of its proper divisors (3365731).

77480489 is a wasteful number, since it uses less digits than its factorization.

77480489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 719 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 77480489 is about 8802.3002107404. The cubic root of 77480489 is about 426.3151675230.

The spelling of 77480489 in words is "seventy-seven million, four hundred eighty thousand, four hundred eighty-nine".