84478478 has 8 divisors (see below), whose sum is σ = 144820272. Its totient is φ = 36205056.

The previous prime is 84478477. The next prime is 84478487. The reversal of 84478478 is 87487448.

It is a happy number.

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

It is a super-2 number, since 2×84478478² = 14273226490392968, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84478477) 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, 3017075 + ... + 3017102.

It is an arithmetic number, because the mean of its divisors is an integer number (18102534).

Almost surely, 2^84478478 is an apocalyptic number.

84478478 is a deficient number, since it is larger than the sum of its proper divisors (60341794).

84478478 is a wasteful number, since it uses less digits than its factorization.

84478478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6034186.

The product of its digits is 1605632, while the sum is 50.

The square root of 84478478 is about 9191.2174384028. The cubic root of 84478478 is about 438.7818891171.

The spelling of 84478478 in words is "eighty-four million, four hundred seventy-eight thousand, four hundred seventy-eight".