77531044 has 6 divisors (see below), whose sum is σ = 135679334. Its totient is φ = 38765520.

The previous prime is 77531029. The next prime is 77531053. The reversal of 77531044 is 44013577.

It can be written as a sum of positive squares in only one way, i.e., 63393444 + 14137600 = 7962^2 + 3760^2 .

It is a super-2 number, since 2×77531044² = 12022125567459872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77530997 and 77531015.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9691377 + ... + 9691384.

Almost surely, 2^77531044 is an apocalyptic number.

It is an amenable number.

77531044 is a deficient number, since it is larger than the sum of its proper divisors (58148290).

77531044 is a wasteful number, since it uses less digits than its factorization.

77531044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19382765 (or 19382763 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 77531044 is about 8805.1714350148. The cubic root of 77531044 is about 426.4078690437.

The spelling of 77531044 in words is "seventy-seven million, five hundred thirty-one thousand, forty-four".