84945904 has 20 divisors (see below), whose sum is σ = 164829976. Its totient is φ = 42409152.

The previous prime is 84945869. The next prime is 84945929. The reversal of 84945904 is 40954948.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8107 + ... + 15349.

Almost surely, 2^84945904 is an apocalyptic number.

It is an amenable number.

84945904 is a deficient number, since it is larger than the sum of its proper divisors (79884072).

84945904 is a wasteful number, since it uses less digits than its factorization.

84945904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7984 (or 7978 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 84945904 is about 9216.6102228531. The cubic root of 84945904 is about 439.5896725594.

It can be divided in two parts, 84945 and 904, that added together give a square (85849 = 293²).

The spelling of 84945904 in words is "eighty-four million, nine hundred forty-five thousand, nine hundred four".