84378512 has 10 divisors (see below), whose sum is σ = 163483398. Its totient is φ = 42189248.

The previous prime is 84378493. The next prime is 84378521. The reversal of 84378512 is 21587348.

It can be written as a sum of positive squares in only one way, i.e., 52070656 + 32307856 = 7216^2 + 5684^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2636813 + ... + 2636844.

Almost surely, 2^84378512 is an apocalyptic number.

It is an amenable number.

84378512 is a deficient number, since it is larger than the sum of its proper divisors (79104886).

84378512 is a wasteful number, since it uses less digits than its factorization.

84378512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5273665 (or 5273659 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 84378512 is about 9185.7777025138. Note that the first 4 decimals coincide. The cubic root of 84378512 is about 438.6087460699.

The spelling of 84378512 in words is "eighty-four million, three hundred seventy-eight thousand, five hundred twelve".