78636430 has 8 divisors (see below), whose sum is σ = 141545592. Its totient is φ = 31454568.

The previous prime is 78636427. The next prime is 78636431. The reversal of 78636430 is 3463687.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 78636430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78636431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3931812 + ... + 3931831.

It is an arithmetic number, because the mean of its divisors is an integer number (17693199).

Almost surely, 2^78636430 is an apocalyptic number.

78636430 is a deficient number, since it is larger than the sum of its proper divisors (62909162).

78636430 is a wasteful number, since it uses less digits than its factorization.

78636430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7863650.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 78636430 is about 8867.7184213303. The cubic root of 78636430 is about 428.4247936973.

The spelling of 78636430 in words is "seventy-eight million, six hundred thirty-six thousand, four hundred thirty".