77044 has 24 divisors (see below), whose sum is σ = 157248. Its totient is φ = 32640.

The previous prime is 77041. The next prime is 77047. The reversal of 77044 is 44077.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (77041) and next prime (77047).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697 + ... + 799.

It is an arithmetic number, because the mean of its divisors is an integer number (6552).

2⁷⁷⁰⁴⁴ is an apocalyptic number.

It is an amenable number.

77044 is an abundant number, since it is smaller than the sum of its proper divisors (80204).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78624).

77044 is a wasteful number, since it uses less digits than its factorization.

77044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 77044 is about 277.5680096841. The cubic root of 77044 is about 42.5513105764.

Adding to 77044 its reverse (44077), we get a palindrome (121121).

The spelling of 77044 in words is "seventy-seven thousand, forty-four", and thus it is an iban number.