84391378 has 8 divisors (see below), whose sum is σ = 127117440. Its totient is φ = 42018900.

The previous prime is 84391343. The next prime is 84391399. The reversal of 84391378 is 87319348.

It is a happy number.

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, 87798 + ... + 88753.

It is an arithmetic number, because the mean of its divisors is an integer number (15889680).

Almost surely, 2^84391378 is an apocalyptic number.

84391378 is a deficient number, since it is larger than the sum of its proper divisors (42726062).

84391378 is a wasteful number, since it uses less digits than its factorization.

84391378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176792.

The product of its digits is 145152, while the sum is 43.

The square root of 84391378 is about 9186.4779975788. The cubic root of 84391378 is about 438.6310378959.

The spelling of 84391378 in words is "eighty-four million, three hundred ninety-one thousand, three hundred seventy-eight".