78948146 has 4 divisors (see below), whose sum is σ = 118422222. Its totient is φ = 39474072.

The previous prime is 78948139. The next prime is 78948151. The reversal of 78948146 is 64184987.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 58599025 + 20349121 = 7655^2 + 4511^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78948146.

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 as a sum of consecutive naturals, namely, 19737035 + ... + 19737038.

Almost surely, 2^78948146 is an apocalyptic number.

78948146 is a deficient number, since it is larger than the sum of its proper divisors (39474076).

78948146 is a wasteful number, since it uses less digits than its factorization.

78948146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39474075.

The product of its digits is 387072, while the sum is 47.

The square root of 78948146 is about 8885.2769230902. The cubic root of 78948146 is about 428.9901414629.

The spelling of 78948146 in words is "seventy-eight million, nine hundred forty-eight thousand, one hundred forty-six".