78943650 has 24 divisors (see below), whose sum is σ = 195780624. Its totient is φ = 21051600.

The previous prime is 78943643. The next prime is 78943663. The reversal of 78943650 is 5634987.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262996 + ... + 263295.

It is an arithmetic number, because the mean of its divisors is an integer number (8157526).

Almost surely, 2^78943650 is an apocalyptic number.

78943650 is an abundant number, since it is smaller than the sum of its proper divisors (116836974).

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

78943650 is a wasteful number, since it uses less digits than its factorization.

78943650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526306 (or 526301 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 78943650 is about 8885.0239166814. The cubic root of 78943650 is about 428.9819978210.

The spelling of 78943650 in words is "seventy-eight million, nine hundred forty-three thousand, six hundred fifty".