78445378 has 32 divisors (see below), whose sum is σ = 136997568. Its totient is φ = 33292800.

The previous prime is 78445363. The next prime is 78445399. The reversal of 78445378 is 87354487.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50473 + ... + 52003.

It is an arithmetic number, because the mean of its divisors is an integer number (4281174).

Almost surely, 2^78445378 is an apocalyptic number.

78445378 is a deficient number, since it is larger than the sum of its proper divisors (58552190).

78445378 is a wasteful number, since it uses less digits than its factorization.

78445378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698.

The product of its digits is 752640, while the sum is 46.

The square root of 78445378 is about 8856.9395391410. The cubic root of 78445378 is about 428.0775509458.

The spelling of 78445378 in words is "seventy-eight million, four hundred forty-five thousand, three hundred seventy-eight".