77620216 has 32 divisors (see below), whose sum is σ = 155584800. Its totient is φ = 36213760.

The previous prime is 77620201. The next prime is 77620229. The reversal of 77620216 is 61202677.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2400 + ... + 12688.

It is an arithmetic number, because the mean of its divisors is an integer number (4862025).

Almost surely, 2^77620216 is an apocalyptic number.

It is an amenable number.

77620216 is an abundant number, since it is smaller than the sum of its proper divisors (77964584).

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

77620216 is a wasteful number, since it uses less digits than its factorization.

77620216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359 (or 10355 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 77620216 is about 8810.2335950870. The cubic root of 77620216 is about 426.5712834743.

The spelling of 77620216 in words is "seventy-seven million, six hundred twenty thousand, two hundred sixteen".