77899650 has 48 divisors (see below), whose sum is σ = 195549984. Its totient is φ = 20519680.

The previous prime is 77899649. The next prime is 77899667. The reversal of 77899650 is 5699877.

It is a junction number, because it is equal to n+sod(n) for n = 77899593 and 77899602.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9322 + ... + 15578.

It is an arithmetic number, because the mean of its divisors is an integer number (4073958).

Almost surely, 2^77899650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77899650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97774992).

77899650 is an abundant number, since it is smaller than the sum of its proper divisors (117650334).

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

77899650 is a wasteful number, since it uses less digits than its factorization.

77899650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6355 (or 6350 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 77899650 is about 8826.0778378621. The cubic root of 77899650 is about 427.0825582113.

The spelling of 77899650 in words is "seventy-seven million, eight hundred ninety-nine thousand, six hundred fifty".