77898366 has 96 divisors (see below), whose sum is σ = 218749440. Its totient is φ = 19455552.

The previous prime is 77898343. The next prime is 77898367. The reversal of 77898366 is 66389877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77898367) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 29871 + ... + 32373.

It is an arithmetic number, because the mean of its divisors is an integer number (2278640).

Almost surely, 2^77898366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77898366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109374720).

77898366 is an abundant number, since it is smaller than the sum of its proper divisors (140851074).

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

77898366 is a wasteful number, since it uses less digits than its factorization.

77898366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550 (or 2547 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 77898366 is about 8826.0050985709. The cubic root of 77898366 is about 427.0802117009.

The spelling of 77898366 in words is "seventy-seven million, eight hundred ninety-eight thousand, three hundred sixty-six".