78989026 has 4 divisors (see below), whose sum is σ = 118483542. Its totient is φ = 39494512.

The previous prime is 78989017. The next prime is 78989033. The reversal of 78989026 is 62098987.

It is a happy number.

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., 60918025 + 18071001 = 7805^2 + 4251^2 .

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, 19747255 + ... + 19747258.

Almost surely, 2^78989026 is an apocalyptic number.

78989026 is a deficient number, since it is larger than the sum of its proper divisors (39494516).

78989026 is a wasteful number, since it uses less digits than its factorization.

78989026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39494515.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 78989026 is about 8887.5770601441. The cubic root of 78989026 is about 429.0641735620.

The spelling of 78989026 in words is "seventy-eight million, nine hundred eighty-nine thousand, twenty-six".