77478056 has 16 divisors (see below), whose sum is σ = 145389600. Its totient is φ = 38707504.

The previous prime is 77478041. The next prime is 77478059. The reversal of 77478056 is 65087477.

It is a junction number, because it is equal to n+sod(n) for n = 77477998 and 77478016.

It is not an unprimeable number, because it can be changed into a prime (77478059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9005 + ... + 15363.

It is an arithmetic number, because the mean of its divisors is an integer number (9086850).

Almost surely, 2^77478056 is an apocalyptic number.

It is an amenable number.

77478056 is a deficient number, since it is larger than the sum of its proper divisors (67911544).

77478056 is a wasteful number, since it uses less digits than its factorization.

77478056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7888 (or 7884 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 77478056 is about 8802.1620071435. The cubic root of 77478056 is about 426.3107051710.

The spelling of 77478056 in words is "seventy-seven million, four hundred seventy-eight thousand, fifty-six".