77438460 has 48 divisors (see below), whose sum is σ = 236541312. Its totient is φ = 18772800.

The previous prime is 77438437. The next prime is 77438461. The reversal of 77438460 is 6483477.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77438461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58006 + ... + 59325.

It is an arithmetic number, because the mean of its divisors is an integer number (4927944).

Almost surely, 2^77438460 is an apocalyptic number.

It is an amenable number.

77438460 is an abundant number, since it is smaller than the sum of its proper divisors (159102852).

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

77438460 is a wasteful number, since it uses less digits than its factorization.

77438460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117354 (or 117352 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 77438460 is about 8799.9124995650. The cubic root of 77438460 is about 426.2380692274.

The spelling of 77438460 in words is "seventy-seven million, four hundred thirty-eight thousand, four hundred sixty".