78526004 has 12 divisors (see below), whose sum is σ = 137619300. Its totient is φ = 39206208.

The previous prime is 78526003. The next prime is 78526013. The reversal of 78526004 is 40062587.

It can be written as a sum of positive squares in 2 ways, for example, as 8133904 + 70392100 = 2852^2 + 8390^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78526001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11009 + ... + 16680.

It is an arithmetic number, because the mean of its divisors is an integer number (11468275).

Almost surely, 2^78526004 is an apocalyptic number.

It is an amenable number.

78526004 is a deficient number, since it is larger than the sum of its proper divisors (59093296).

78526004 is a wasteful number, since it uses less digits than its factorization.

78526004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28402 (or 28400 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 78526004 is about 8861.4899424420. The cubic root of 78526004 is about 428.2241598080.

The spelling of 78526004 in words is "seventy-eight million, five hundred twenty-six thousand, four".