84378404 has 24 divisors (see below), whose sum is σ = 166285056. Its totient is φ = 37116000.

The previous prime is 84378403. The next prime is 84378407. The reversal of 84378404 is 40487348.

It is not an unprimeable number, because it can be changed into a prime (84378401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29567 + ... + 32294.

It is an arithmetic number, because the mean of its divisors is an integer number (6928544).

Almost surely, 2^84378404 is an apocalyptic number.

It is an amenable number.

84378404 is a deficient number, since it is larger than the sum of its proper divisors (81906652).

84378404 is a wasteful number, since it uses less digits than its factorization.

84378404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61907 (or 61905 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 84378404 is about 9185.7718238589. The cubic root of 84378404 is about 438.6085589379.

The spelling of 84378404 in words is "eighty-four million, three hundred seventy-eight thousand, four hundred four".