77070144 has 28 divisors (see below), whose sum is σ = 203915264. Its totient is φ = 25689984.

The previous prime is 77070073. The next prime is 77070157. The reversal of 77070144 is 44107077.

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, 200512 + ... + 200895.

It is an arithmetic number, because the mean of its divisors is an integer number (7282688).

Almost surely, 2^77070144 is an apocalyptic number.

It is an amenable number.

77070144 is an abundant number, since it is smaller than the sum of its proper divisors (126845120).

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

77070144 is a wasteful number, since it uses less digits than its factorization.

77070144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401422 (or 401412 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 77070144 is about 8778.9603029060. The cubic root of 77070144 is about 425.5612313227.

The spelling of 77070144 in words is "seventy-seven million, seventy thousand, one hundred forty-four".