77886220 has 24 divisors (see below), whose sum is σ = 163732464. Its totient is φ = 31121856.

The previous prime is 77886217. The next prime is 77886233. The reversal of 77886220 is 2268877.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29182 + ... + 31738.

It is an arithmetic number, because the mean of its divisors is an integer number (6822186).

Almost surely, 2^77886220 is an apocalyptic number.

It is an amenable number.

77886220 is an abundant number, since it is smaller than the sum of its proper divisors (85846244).

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

77886220 is a wasteful number, since it uses less digits than its factorization.

77886220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089 (or 4087 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 77886220 is about 8825.3169914740. The cubic root of 77886220 is about 427.0580136064.

The spelling of 77886220 in words is "seventy-seven million, eight hundred eighty-six thousand, two hundred twenty".