77761404 has 48 divisors (see below), whose sum is σ = 230406400. Its totient is φ = 22217328.

The previous prime is 77761403. The next prime is 77761427. The reversal of 77761404 is 40416777.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77761403) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 50674 + ... + 52185.

Almost surely, 2^77761404 is an apocalyptic number.

It is an amenable number.

77761404 is an abundant number, since it is smaller than the sum of its proper divisors (152644996).

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

77761404 is a wasteful number, since it uses less digits than its factorization.

77761404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102879 (or 102871 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The square root of 77761404 is about 8818.2426820767. The cubic root of 77761404 is about 426.8297653907.

It can be divided in two parts, 7776 and 1404, that added together give a triangular number (9180 = T₁₃₅).

The spelling of 77761404 in words is "seventy-seven million, seven hundred sixty-one thousand, four hundred four".