77433678 has 64 divisors (see below), whose sum is σ = 198328320. Its totient is φ = 21936096.

The previous prime is 77433673. The next prime is 77433679. The reversal of 77433678 is 87633477.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77433673) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47200 + ... + 48812.

It is an arithmetic number, because the mean of its divisors is an integer number (3098880).

Almost surely, 2^77433678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77433678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99164160).

77433678 is an abundant number, since it is smaller than the sum of its proper divisors (120894642).

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

77433678 is a wasteful number, since it uses less digits than its factorization.

77433678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758 (or 1752 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 77433678 is about 8799.6407881231. The cubic root of 77433678 is about 426.2292953253.

The spelling of 77433678 in words is "seventy-seven million, four hundred thirty-three thousand, six hundred seventy-eight".