77775044 has 12 divisors (see below), whose sum is σ = 136464384. Its totient is φ = 38785224.

The previous prime is 77775023. The next prime is 77775059. The reversal of 77775044 is 44057777.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 77774992 and 77775010.

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, 23852 + ... + 26915.

It is an arithmetic number, because the mean of its divisors is an integer number (11372032).

Almost surely, 2^77775044 is an apocalyptic number.

It is an amenable number.

77775044 is a deficient number, since it is larger than the sum of its proper divisors (58689340).

77775044 is a wasteful number, since it uses less digits than its factorization.

77775044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51154 (or 51152 counting only the distinct ones).

The product of its (nonzero) digits is 192080, while the sum is 41.

The square root of 77775044 is about 8819.0160448885. The cubic root of 77775044 is about 426.8547204341.

It can be divided in two parts, 7777 and 5044, that added together give a palindrome (12821).

The spelling of 77775044 in words is "seventy-seven million, seven hundred seventy-five thousand, forty-four".