77448512 has 28 divisors (see below), whose sum is σ = 155425140. Its totient is φ = 38286336.

The previous prime is 77448499. The next prime is 77448557. The reversal of 77448512 is 21584477.

It can be written as a sum of positive squares in 2 ways, for example, as 10601536 + 66846976 = 3256^2 + 8176^2 .

It is a super-2 number, since 2×77448512² = 11996544022028288, which contains 22 as substring.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 1103 + ... + 12494.

Almost surely, 2^77448512 is an apocalyptic number.

It is an amenable number.

77448512 is an abundant number, since it is smaller than the sum of its proper divisors (77976628).

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

77448512 is a wasteful number, since it uses less digits than its factorization.

77448512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13698 (or 13688 counting only the distinct ones).

The product of its digits is 62720, while the sum is 38.

The square root of 77448512 is about 8800.4836230744. The cubic root of 77448512 is about 426.2565112251.

The spelling of 77448512 in words is "seventy-seven million, four hundred forty-eight thousand, five hundred twelve".