78603940 has 12 divisors (see below), whose sum is σ = 165068316. Its totient is φ = 31441568.

The previous prime is 78603923. The next prime is 78603961. The reversal of 78603940 is 4930687.

It can be written as a sum of positive squares in 2 ways, for example, as 13704804 + 64899136 = 3702^2 + 8056^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78603940.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1965079 + ... + 1965118.

It is an arithmetic number, because the mean of its divisors is an integer number (13755693).

Almost surely, 2^78603940 is an apocalyptic number.

It is an amenable number.

78603940 is an abundant number, since it is smaller than the sum of its proper divisors (86464376).

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

78603940 is a wasteful number, since it uses less digits than its factorization.

78603940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930206 (or 3930204 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 78603940 is about 8865.8863065122. The cubic root of 78603940 is about 428.3657818669.

The spelling of 78603940 in words is "seventy-eight million, six hundred three thousand, nine hundred forty".