78678458 has 8 divisors (see below), whose sum is σ = 118287840. Its totient is φ = 39249180.

The previous prime is 78678443. The next prime is 78678473. The reversal of 78678458 is 85487687.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78678443) and next prime (78678473).

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

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, 43928 + ... + 45683.

It is an arithmetic number, because the mean of its divisors is an integer number (14785980).

Almost surely, 2^78678458 is an apocalyptic number.

78678458 is a deficient number, since it is larger than the sum of its proper divisors (39609382).

78678458 is a wasteful number, since it uses less digits than its factorization.

78678458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90052.

The product of its digits is 3010560, while the sum is 53.

The square root of 78678458 is about 8870.0878236915. The cubic root of 78678458 is about 428.5011053609.

The spelling of 78678458 in words is "seventy-eight million, six hundred seventy-eight thousand, four hundred fifty-eight".