77321112 has 64 divisors (see below), whose sum is σ = 212889600. Its totient is φ = 23207040.

The previous prime is 77321107. The next prime is 77321137. The reversal of 77321112 is 21112377.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27433 + ... + 30119.

It is an arithmetic number, because the mean of its divisors is an integer number (3326400).

Almost surely, 2^77321112 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 77321112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106444800).

77321112 is an abundant number, since it is smaller than the sum of its proper divisors (135568488).

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

77321112 is a wasteful number, since it uses less digits than its factorization.

77321112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2816 (or 2812 counting only the distinct ones).

The product of its digits is 588, while the sum is 24.

The square root of 77321112 is about 8793.2424053929. The cubic root of 77321112 is about 426.0226574385.

Adding to 77321112 its reverse (21112377), we get a palindrome (98433489).

The spelling of 77321112 in words is "seventy-seven million, three hundred twenty-one thousand, one hundred twelve".