77690136 has 96 divisors (see below), whose sum is σ = 215735040. Its totient is φ = 23265792.

The previous prime is 77690131. The next prime is 77690143. The reversal of 77690136 is 63109677.

It is a junction number, because it is equal to n+sod(n) for n = 77690094 and 77690103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77690131) by changing a digit.

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, 159285 + ... + 159771.

It is an arithmetic number, because the mean of its divisors is an integer number (2247240).

Almost surely, 2^77690136 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 77690136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107867520).

77690136 is an abundant number, since it is smaller than the sum of its proper divisors (138044904).

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

77690136 is a wasteful number, since it uses less digits than its factorization.

77690136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 77690136 is about 8814.2008145946. The cubic root of 77690136 is about 426.6993296392.

The spelling of 77690136 in words is "seventy-seven million, six hundred ninety thousand, one hundred thirty-six".