77480064 has 192 divisors, whose sum is σ = 240589440. Its totient is φ = 24800256.

The previous prime is 77480059. The next prime is 77480069. The reversal of 77480064 is 46008477.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77480059) and next prime (77480069).

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77480069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1461862 + ... + 1461914.

It is an arithmetic number, because the mean of its divisors is an integer number (1253070).

Almost surely, 2^77480064 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 77480064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120294720).

77480064 is an abundant number, since it is smaller than the sum of its proper divisors (163109376).

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

77480064 is an equidigital number, since it uses as much as digits as its factorization.

77480064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 77480064 is about 8802.2760692903. The cubic root of 77480064 is about 426.3143880396.

The spelling of 77480064 in words is "seventy-seven million, four hundred eighty thousand, sixty-four".