78526340 has 24 divisors (see below), whose sum is σ = 165197760. Its totient is φ = 31354848.

The previous prime is 78526339. The next prime is 78526351. The reversal of 78526340 is 4362587.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 78526340.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9209 + ... + 15551.

It is an arithmetic number, because the mean of its divisors is an integer number (6883240).

Almost surely, 2^78526340 is an apocalyptic number.

It is an amenable number.

78526340 is an abundant number, since it is smaller than the sum of its proper divisors (86671420).

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

78526340 is a wasteful number, since it uses less digits than its factorization.

78526340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6971 (or 6969 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 78526340 is about 8861.5089008588. The cubic root of 78526340 is about 428.2247705743.

The spelling of 78526340 in words is "seventy-eight million, five hundred twenty-six thousand, three hundred forty".