77530712 has 16 divisors (see below), whose sum is σ = 166137360. Its totient is φ = 33227424.

The previous prime is 77530709. The next prime is 77530751. The reversal of 77530712 is 21703577.

It is a super-2 number, since 2×77530712² = 12022022606453888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692183 + ... + 692294.

It is an arithmetic number, because the mean of its divisors is an integer number (10383585).

Almost surely, 2^77530712 is an apocalyptic number.

It is an amenable number.

77530712 is an abundant number, since it is smaller than the sum of its proper divisors (88606648).

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

77530712 is a wasteful number, since it uses less digits than its factorization.

77530712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384490 (or 1384486 counting only the distinct ones).

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 77530712 is about 8805.1525824372. The cubic root of 77530712 is about 426.4072603945.

The spelling of 77530712 in words is "seventy-seven million, five hundred thirty thousand, seven hundred twelve".