78563340 has 36 divisors (see below), whose sum is σ = 238309344. Its totient is φ = 20950176.

The previous prime is 78563311. The next prime is 78563351. The reversal of 78563340 is 4336587.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 78563295 and 78563304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 218052 + ... + 218411.

It is an arithmetic number, because the mean of its divisors is an integer number (6619704).

Almost surely, 2^78563340 is an apocalyptic number.

It is an amenable number.

78563340 is an abundant number, since it is smaller than the sum of its proper divisors (159746004).

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

78563340 is a wasteful number, since it uses less digits than its factorization.

78563340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436478 (or 436473 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 78563340 is about 8863.5963355740. The cubic root of 78563340 is about 428.2920169218.

The spelling of 78563340 in words is "seventy-eight million, five hundred sixty-three thousand, three hundred forty".