77052180 has 48 divisors (see below), whose sum is σ = 216224064. Its totient is φ = 20501760.

The previous prime is 77052179. The next prime is 77052181. The reversal of 77052180 is 8125077.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77052179) and next prime (77052181).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77052181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32640 + ... + 34920.

It is an arithmetic number, because the mean of its divisors is an integer number (4504668).

Almost surely, 2^77052180 is an apocalyptic number.

It is an amenable number.

77052180 is an abundant number, since it is smaller than the sum of its proper divisors (139171884).

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

77052180 is a wasteful number, since it uses less digits than its factorization.

77052180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 77052180 is about 8777.9371152908. The cubic root of 77052180 is about 425.5281645794.

The spelling of 77052180 in words is "seventy-seven million, fifty-two thousand, one hundred eighty".