77085432 has 96 divisors (see below), whose sum is σ = 228009600. Its totient is φ = 24331104.

The previous prime is 77085419. The next prime is 77085439. The reversal of 77085432 is 23458077.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77085439) 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 23 ways as a sum of consecutive naturals, for example, 35893 + ... + 37979.

It is an arithmetic number, because the mean of its divisors is an integer number (2375100).

Almost surely, 2^77085432 is an apocalyptic number.

77085432 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77085432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114004800).

77085432 is an abundant number, since it is smaller than the sum of its proper divisors (150924168).

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

77085432 is a wasteful number, since it uses less digits than its factorization.

77085432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2127 (or 2111 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 77085432 is about 8779.8309778720. The cubic root of 77085432 is about 425.5893682450.

The spelling of 77085432 in words is "seventy-seven million, eighty-five thousand, four hundred thirty-two".