77342208 has 80 divisors (see below), whose sum is σ = 211016256. Its totient is φ = 25159680.

The previous prime is 77342207. The next prime is 77342233. The reversal of 77342208 is 80224377.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77342201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65463 + ... + 66633.

Almost surely, 2^77342208 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 77342208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105508128).

77342208 is an abundant number, since it is smaller than the sum of its proper divisors (133674048).

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

77342208 is a wasteful number, since it uses less digits than its factorization.

77342208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 77342208 is about 8794.4418810974. The cubic root of 77342208 is about 426.0613987193.

The spelling of 77342208 in words is "seventy-seven million, three hundred forty-two thousand, two hundred eight".