77318406 has 48 divisors (see below), whose sum is σ = 185103360. Its totient is φ = 23128560.

The previous prime is 77318393. The next prime is 77318411. The reversal of 77318406 is 60481377.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13171 + ... + 18113.

It is an arithmetic number, because the mean of its divisors is an integer number (3856320).

Almost surely, 2^77318406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77318406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92551680).

77318406 is an abundant number, since it is smaller than the sum of its proper divisors (107784954).

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

77318406 is a wasteful number, since it uses less digits than its factorization.

77318406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5041 (or 5038 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 77318406 is about 8793.0885358900. The cubic root of 77318406 is about 426.0176875550.

The spelling of 77318406 in words is "seventy-seven million, three hundred eighteen thousand, four hundred six".