77412208 has 40 divisors (see below), whose sum is σ = 156517760. Its totient is φ = 37048320.

The previous prime is 77412197. The next prime is 77412229. The reversal of 77412208 is 80221477.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a self number, because there is not a number n which added to its sum of digits gives 77412208.

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, 47308 + ... + 48916.

It is an arithmetic number, because the mean of its divisors is an integer number (3912944).

Almost surely, 2^77412208 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 77412208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78258880).

77412208 is an abundant number, since it is smaller than the sum of its proper divisors (79105552).

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

77412208 is a wasteful number, since it uses less digits than its factorization.

77412208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1745 (or 1739 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 77412208 is about 8798.4207673877. The cubic root of 77412208 is about 426.1898982175.

The spelling of 77412208 in words is "seventy-seven million, four hundred twelve thousand, two hundred eight".