77797848 has 64 divisors (see below), whose sum is σ = 212613120. Its totient is φ = 23616000.

The previous prime is 77797843. The next prime is 77797849. The reversal of 77797848 is 84879777.

It is a super-2 number, since 2×77797848² = 12105010306862208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77797843) 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, 9573 + ... + 15723.

It is an arithmetic number, because the mean of its divisors is an integer number (3322080).

Almost surely, 2^77797848 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 77797848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106306560).

77797848 is an abundant number, since it is smaller than the sum of its proper divisors (134815272).

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

77797848 is a wasteful number, since it uses less digits than its factorization.

77797848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208 (or 6204 counting only the distinct ones).

The product of its digits is 5531904, while the sum is 57.

The square root of 77797848 is about 8820.3088381303. The cubic root of 77797848 is about 426.8964349454.

The spelling of 77797848 in words is "seventy-seven million, seven hundred ninety-seven thousand, eight hundred forty-eight".