77898496 has 72 divisors (see below), whose sum is σ = 169979040. Its totient is φ = 35414016.

The previous prime is 77898481. The next prime is 77898497. The reversal of 77898496 is 69489877.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 77898496.

It is not an unprimeable number, because it can be changed into a prime (77898497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296061 + ... + 296323.

It is an arithmetic number, because the mean of its divisors is an integer number (2360820).

Almost surely, 2^77898496 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 77898496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84989520).

77898496 is an abundant number, since it is smaller than the sum of its proper divisors (92080544).

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

77898496 is a wasteful number, since it uses less digits than its factorization.

77898496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 367 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 58.

The square root of 77898496 is about 8826.0124631682. The cubic root of 77898496 is about 427.0804492771.

The spelling of 77898496 in words is "seventy-seven million, eight hundred ninety-eight thousand, four hundred ninety-six".