78585740 has 24 divisors (see below), whose sum is σ = 165893280. Its totient is φ = 31269888.

The previous prime is 78585719. The next prime is 78585757. The reversal of 78585740 is 4758587.

It is a junction number, because it is equal to n+sod(n) for n = 78585691 and 78585700.

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, 6320 + ... + 14039.

It is an arithmetic number, because the mean of its divisors is an integer number (6912220).

Almost surely, 2^78585740 is an apocalyptic number.

It is an amenable number.

78585740 is an abundant number, since it is smaller than the sum of its proper divisors (87307540).

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

78585740 is a wasteful number, since it uses less digits than its factorization.

78585740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20561 (or 20559 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 78585740 is about 8864.8598409676. The cubic root of 78585740 is about 428.3327179644.

The spelling of 78585740 in words is "seventy-eight million, five hundred eighty-five thousand, seven hundred forty".