78578670 has 16 divisors (see below), whose sum is σ = 188588880. Its totient is φ = 20954304.

The previous prime is 78578663. The next prime is 78578683. The reversal of 78578670 is 7687587.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1309615 + ... + 1309674.

It is an arithmetic number, because the mean of its divisors is an integer number (11786805).

Almost surely, 2^78578670 is an apocalyptic number.

78578670 is an abundant number, since it is smaller than the sum of its proper divisors (110010210).

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

78578670 is a wasteful number, since it uses less digits than its factorization.

78578670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619299.

The product of its (nonzero) digits is 658560, while the sum is 48.

The square root of 78578670 is about 8864.4610665285. The cubic root of 78578670 is about 428.3198725333.

The spelling of 78578670 in words is "seventy-eight million, five hundred seventy-eight thousand, six hundred seventy".