78084660 has 48 divisors (see below), whose sum is σ = 225695232. Its totient is φ = 20150400.

The previous prime is 78084647. The next prime is 78084683. The reversal of 78084660 is 6648087.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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, 19131 + ... + 22850.

It is an arithmetic number, because the mean of its divisors is an integer number (4701984).

Almost surely, 2^78084660 is an apocalyptic number.

It is an amenable number.

78084660 is an abundant number, since it is smaller than the sum of its proper divisors (147610572).

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

78084660 is a wasteful number, since it uses less digits than its factorization.

78084660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42024 (or 42022 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 78084660 is about 8836.5524951759. The cubic root of 78084660 is about 427.4203948763.

The spelling of 78084660 in words is "seventy-eight million, eighty-four thousand, six hundred sixty".