78945146 has 8 divisors (see below), whose sum is σ = 135334560. Its totient is φ = 33833628.

The previous prime is 78945137. The next prime is 78945149. The reversal of 78945146 is 64154987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×78945146² = 12464672153922632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78945097 and 78945106.

It is not an unprimeable number, because it can be changed into a prime (78945149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2819456 + ... + 2819483.

It is an arithmetic number, because the mean of its divisors is an integer number (16916820).

Almost surely, 2^78945146 is an apocalyptic number.

78945146 is a deficient number, since it is larger than the sum of its proper divisors (56389414).

78945146 is a wasteful number, since it uses less digits than its factorization.

78945146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5638948.

The product of its digits is 241920, while the sum is 44.

The square root of 78945146 is about 8885.1081028877. The cubic root of 78945146 is about 428.9847075725.

The spelling of 78945146 in words is "seventy-eight million, nine hundred forty-five thousand, one hundred forty-six".