77243483928 has 256 divisors, whose sum is σ = 219650457600. Its totient is φ = 22472225280.

The previous prime is 77243483893. The next prime is 77243483929. The reversal of 77243483928 is 82938434277.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77243483929) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 127254201 + ... + 127254807.

It is an arithmetic number, because the mean of its divisors is an integer number (858009600).

Almost surely, 2^77243483928 is an apocalyptic number.

77243483928 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77243483928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109825228800).

77243483928 is an abundant number, since it is smaller than the sum of its proper divisors (142406973672).

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

77243483928 is a wasteful number, since it uses less digits than its factorization.

77243483928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942 (or 938 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 57.

The spelling of 77243483928 in words is "seventy-seven billion, two hundred forty-three million, four hundred eighty-three thousand, nine hundred twenty-eight".