77085012 has 12 divisors (see below), whose sum is σ = 179865056. Its totient is φ = 25695000.

The previous prime is 77085011. The next prime is 77085013. The reversal of 77085012 is 21058077.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77085011) and next prime (77085013).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77085011) 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 3 ways as a sum of consecutive naturals, for example, 3211864 + ... + 3211887.

Almost surely, 2^77085012 is an apocalyptic number.

It is an amenable number.

77085012 is an abundant number, since it is smaller than the sum of its proper divisors (102780044).

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

77085012 is a wasteful number, since it uses less digits than its factorization.

77085012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6423758 (or 6423756 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 77085012 is about 8779.8070593835. The cubic root of 77085012 is about 425.5885953023.

It can be divided in two parts, 7708 and 5012, that added together give a triangular number (12720 = T₁₅₉).

The spelling of 77085012 in words is "seventy-seven million, eighty-five thousand, twelve".