78523408 has 20 divisors (see below), whose sum is σ = 161089020. Its totient is φ = 36952064.

The previous prime is 78523351. The next prime is 78523433. The reversal of 78523408 is 80432587.

It can be written as a sum of positive squares in 2 ways, for example, as 55175184 + 23348224 = 7428^2 + 4832^2 .

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, 144073 + ... + 144616.

It is an arithmetic number, because the mean of its divisors is an integer number (8054451).

Almost surely, 2^78523408 is an apocalyptic number.

It is an amenable number.

78523408 is an abundant number, since it is smaller than the sum of its proper divisors (82565612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78523408 is a wasteful number, since it uses less digits than its factorization.

78523408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288714 (or 288708 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 78523408 is about 8861.3434647349. The cubic root of 78523408 is about 428.2194408524.

The spelling of 78523408 in words is "seventy-eight million, five hundred twenty-three thousand, four hundred eight".