78447334 has 12 divisors (see below), whose sum is σ = 136882764. Its totient is φ = 33620244.

The previous prime is 78447311. The next prime is 78447361. The reversal of 78447334 is 43374487.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 400144 + ... + 400339.

It is an arithmetic number, because the mean of its divisors is an integer number (11406897).

Almost surely, 2^78447334 is an apocalyptic number.

78447334 is a deficient number, since it is larger than the sum of its proper divisors (58435430).

78447334 is a wasteful number, since it uses less digits than its factorization.

78447334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800499 (or 800492 counting only the distinct ones).

The product of its digits is 225792, while the sum is 40.

The square root of 78447334 is about 8857.0499603423. The cubic root of 78447334 is about 428.0811088896.

The spelling of 78447334 in words is "seventy-eight million, four hundred forty-seven thousand, three hundred thirty-four".