77408404 has 6 divisors (see below), whose sum is σ = 135464714. Its totient is φ = 38704200.

The previous prime is 77408399. The next prime is 77408407. The reversal of 77408404 is 40480477.

It can be written as a sum of positive squares in only one way, i.e., 77404804 + 3600 = 8798^2 + 60^2 .

It is a super-2 number, since 2×77408404² = 11984122019654432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77408404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77408407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9676047 + ... + 9676054.

Almost surely, 2^77408404 is an apocalyptic number.

It is an amenable number.

77408404 is a deficient number, since it is larger than the sum of its proper divisors (58056310).

77408404 is a wasteful number, since it uses less digits than its factorization.

77408404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19352105 (or 19352103 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 77408404 is about 8798.2045895739. The cubic root of 77408404 is about 426.1829171785.

The spelling of 77408404 in words is "seventy-seven million, four hundred eight thousand, four hundred four".