77283712 has 64 divisors (see below), whose sum is σ = 169646400. Its totient is φ = 34777600.

The previous prime is 77283671. The next prime is 77283719. The reversal of 77283712 is 21738277.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77283719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184239 + ... + 184657.

It is an arithmetic number, because the mean of its divisors is an integer number (2650725).

Almost surely, 2^77283712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77283712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84823200).

77283712 is an abundant number, since it is smaller than the sum of its proper divisors (92362688).

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

77283712 is a wasteful number, since it uses less digits than its factorization.

77283712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575 (or 563 counting only the distinct ones).

The product of its digits is 32928, while the sum is 37.

The square root of 77283712 is about 8791.1155151096. The cubic root of 77283712 is about 425.9539577150.

The spelling of 77283712 in words is "seventy-seven million, two hundred eighty-three thousand, seven hundred twelve".