77145400 has 48 divisors (see below), whose sum is σ = 179955000. Its totient is φ = 30756480.

The previous prime is 77145389. The next prime is 77145413. The reversal of 77145400 is 454177.

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 99414 + ... + 100186.

Almost surely, 2^77145400 is an apocalyptic number.

It is an amenable number.

77145400 is an abundant number, since it is smaller than the sum of its proper divisors (102809600).

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

77145400 is a wasteful number, since it uses less digits than its factorization.

77145400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 77145400 is about 8783.2454138547. The cubic root of 77145400 is about 425.6997009295.

Adding to 77145400 its reverse (454177), we get a palindrome (77599577).

The spelling of 77145400 in words is "seventy-seven million, one hundred forty-five thousand, four hundred".