78006290 has 8 divisors (see below), whose sum is σ = 140411340. Its totient is φ = 31202512.

The previous prime is 78006283. The next prime is 78006311. The reversal of 78006290 is 9260087.

It can be written as a sum of positive squares in 2 ways, for example, as 77810041 + 196249 = 8821^2 + 443^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3900305 + ... + 3900324.

Almost surely, 2^78006290 is an apocalyptic number.

78006290 is a deficient number, since it is larger than the sum of its proper divisors (62405050).

78006290 is a wasteful number, since it uses less digits than its factorization.

78006290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7800636.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 78006290 is about 8832.1169602763. The cubic root of 78006290 is about 427.2773529137.

The spelling of 78006290 in words is "seventy-eight million, six thousand, two hundred ninety".