77070812 has 48 divisors (see below), whose sum is σ = 168064512. Its totient is φ = 30110400.

The previous prime is 77070811. The next prime is 77070817. The reversal of 77070812 is 21807077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77070811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28937 + ... + 31487.

It is an arithmetic number, because the mean of its divisors is an integer number (3501344).

Almost surely, 2^77070812 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 77070812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84032256).

77070812 is an abundant number, since it is smaller than the sum of its proper divisors (90993700).

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

77070812 is a wasteful number, since it uses less digits than its factorization.

77070812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2658 (or 2656 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 32.

The square root of 77070812 is about 8778.9983483311. The cubic root of 77070812 is about 425.5624608263.

Adding to 77070812 its reverse (21807077), we get a palindrome (98877889).

The spelling of 77070812 in words is "seventy-seven million, seventy thousand, eight hundred twelve".