77912208 has 120 divisors (see below), whose sum is σ = 240716736. Its totient is φ = 23328000.

The previous prime is 77912161. The next prime is 77912209. The reversal of 77912208 is 80221977.

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

It is not an unprimeable number, because it can be changed into a prime (77912209) 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, 159741 + ... + 160227.

Almost surely, 2^77912208 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 77912208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120358368).

77912208 is an abundant number, since it is smaller than the sum of its proper divisors (162804528).

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

77912208 is a wasteful number, since it uses less digits than its factorization.

77912208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 604 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 77912208 is about 8826.7892237212. The cubic root of 77912208 is about 427.1055066011.

It can be divided in two parts, 7791 and 2208, that added together give a palindrome (9999).

The spelling of 77912208 in words is "seventy-seven million, nine hundred twelve thousand, two hundred eight".