77305472 has 16 divisors (see below), whose sum is σ = 154007250. Its totient is φ = 38652672.

The previous prime is 77305457. The next prime is 77305493. The reversal of 77305472 is 27450377.

It can be written as a sum of positive squares in only one way, i.e., 77018176 + 287296 = 8776^2 + 536^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×77305472² = 11952272002285568, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 301847 + ... + 302102.

Almost surely, 2^77305472 is an apocalyptic number.

It is an amenable number.

77305472 is a deficient number, since it is larger than the sum of its proper divisors (76701778).

77305472 is an equidigital number, since it uses as much as digits as its factorization.

77305472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603963 (or 603951 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 35.

The square root of 77305472 is about 8792.3530411375. The cubic root of 77305472 is about 425.9939311588.

It can be divided in two parts, 77305 and 472, that added together give a palindrome (77777).

The spelling of 77305472 in words is "seventy-seven million, three hundred five thousand, four hundred seventy-two".