77289408 has 168 divisors, whose sum is σ = 262310880. Its totient is φ = 21288960.

The previous prime is 77289367. The next prime is 77289439. The reversal of 77289408 is 80498277.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116598 + ... + 117258.

Almost surely, 2^77289408 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 77289408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131155440).

77289408 is an abundant number, since it is smaller than the sum of its proper divisors (185021472).

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

77289408 is a wasteful number, since it uses less digits than its factorization.

77289408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 77289408 is about 8791.4394725779. The cubic root of 77289408 is about 425.9644220767.

The spelling of 77289408 in words is "seventy-seven million, two hundred eighty-nine thousand, four hundred eight".