77243012 has 54 divisors (see below), whose sum is σ = 172892286. Its totient is φ = 30085440.

The previous prime is 77243009. The next prime is 77243059. The reversal of 77243012 is 21034277.

It can be written as a sum of positive squares in only one way, i.e., 74373376 + 2869636 = 8624^2 + 1694^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 22088 + ... + 25344.

It is an arithmetic number, because the mean of its divisors is an integer number (3201709).

Almost surely, 2^77243012 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 77243012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86446143).

77243012 is an abundant number, since it is smaller than the sum of its proper divisors (95649274).

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

77243012 is a wasteful number, since it uses less digits than its factorization.

77243012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3297 (or 3277 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 77243012 is about 8788.8003732022. The cubic root of 77243012 is about 425.8791710629.

Adding to 77243012 its reverse (21034277), we get a palindrome (98277289).

The spelling of 77243012 in words is "seventy-seven million, two hundred forty-three thousand, twelve".