78145006 has 4 divisors (see below), whose sum is σ = 117217512. Its totient is φ = 39072502.

The previous prime is 78144959. The next prime is 78145009. The reversal of 78145006 is 60054187.

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

It is a super-2 number, since 2×78145006² = 12213283925480072, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78145009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19536250 + ... + 19536253.

It is an arithmetic number, because the mean of its divisors is an integer number (29304378).

Almost surely, 2^78145006 is an apocalyptic number.

78145006 is a deficient number, since it is larger than the sum of its proper divisors (39072506).

78145006 is a wasteful number, since it uses less digits than its factorization.

78145006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39072505.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 78145006 is about 8839.9664026511. The cubic root of 78145006 is about 427.5304739855.

The spelling of 78145006 in words is "seventy-eight million, one hundred forty-five thousand, six".