78478454 has 8 divisors (see below), whose sum is σ = 118034400. Its totient is φ = 39133656.

The previous prime is 78478441. The next prime is 78478457. The reversal of 78478454 is 45487487.

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

It is a junction number, because it is equal to n+sod(n) for n = 78478399 and 78478408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78478457) 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, 51854 + ... + 53345.

It is an arithmetic number, because the mean of its divisors is an integer number (14754300).

Almost surely, 2^78478454 is an apocalyptic number.

78478454 is a deficient number, since it is larger than the sum of its proper divisors (39555946).

78478454 is a wasteful number, since it uses less digits than its factorization.

78478454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105574.

The product of its digits is 1003520, while the sum is 47.

The square root of 78478454 is about 8858.8065787667. The cubic root of 78478454 is about 428.1377078935.

The spelling of 78478454 in words is "seventy-eight million, four hundred seventy-eight thousand, four hundred fifty-four".