78427446 has 8 divisors (see below), whose sum is σ = 156854904. Its totient is φ = 26142480.

The previous prime is 78427429. The next prime is 78427451. The reversal of 78427446 is 64472487.

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

78427446 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 78427398 and 78427407.

It is a congruent number.

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, 6535615 + ... + 6535626.

It is an arithmetic number, because the mean of its divisors is an integer number (19606863).

Almost surely, 2^78427446 is an apocalyptic number.

78427446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

78427446 is a wasteful number, since it uses less digits than its factorization.

78427446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13071246.

The product of its digits is 301056, while the sum is 42.

The square root of 78427446 is about 8855.9271677222. The cubic root of 78427446 is about 428.0449300665.

The spelling of 78427446 in words is "seventy-eight million, four hundred twenty-seven thousand, four hundred forty-six".