78082656 has 24 divisors (see below), whose sum is σ = 204967224. Its totient is φ = 26027520.

The previous prime is 78082643. The next prime is 78082673. The reversal of 78082656 is 65628087.

78082656 = 41² + 42² + ... + 616².

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406585 + ... + 406776.

It is an arithmetic number, because the mean of its divisors is an integer number (8540301).

Almost surely, 2^78082656 is an apocalyptic number.

It is an amenable number.

78082656 is an abundant number, since it is smaller than the sum of its proper divisors (126884568).

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

78082656 is a wasteful number, since it uses less digits than its factorization.

78082656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813374 (or 813366 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 78082656 is about 8836.4391018102. The cubic root of 78082656 is about 427.4167383416.

It can be divided in two parts, 780 and 82656, that added together give a triangular number (83436 = T₄₀₈).

The spelling of 78082656 in words is "seventy-eight million, eighty-two thousand, six hundred fifty-six".