78655740 has 48 divisors (see below), whose sum is σ = 220631040. Its totient is φ = 20937280.

The previous prime is 78655739. The next prime is 78655757. The reversal of 78655740 is 4755687.

It is a junction number, because it is equal to n+sod(n) for n = 78655692 and 78655701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53941 + ... + 55379.

It is an arithmetic number, because the mean of its divisors is an integer number (4596480).

Almost surely, 2^78655740 is an apocalyptic number.

It is an amenable number.

78655740 is an abundant number, since it is smaller than the sum of its proper divisors (141975300).

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

78655740 is a wasteful number, since it uses less digits than its factorization.

78655740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362 (or 2360 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 78655740 is about 8868.8071351225. The cubic root of 78655740 is about 428.4598588942.

The spelling of 78655740 in words is "seventy-eight million, six hundred fifty-five thousand, seven hundred forty".