77398044 has 12 divisors (see below), whose sum is σ = 180595464. Its totient is φ = 25799344.

The previous prime is 77398021. The next prime is 77398051. The reversal of 77398044 is 44089377.

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

It is a junction number, because it is equal to n+sod(n) for n = 77397987 and 77398005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3224907 + ... + 3224930.

It is an arithmetic number, because the mean of its divisors is an integer number (15049622).

Almost surely, 2^77398044 is an apocalyptic number.

It is an amenable number.

77398044 is an abundant number, since it is smaller than the sum of its proper divisors (103197420).

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

77398044 is a wasteful number, since it uses less digits than its factorization.

77398044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6449844 (or 6449842 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 77398044 is about 8797.6158133894. The cubic root of 77398044 is about 426.1639035151.

The spelling of 77398044 in words is "seventy-seven million, three hundred ninety-eight thousand, forty-four".