78289634 has 16 divisors (see below), whose sum is σ = 119501568. Its totient is φ = 38458992.

The previous prime is 78289621. The next prime is 78289649. The reversal of 78289634 is 43698287.

It is a super-2 number, since 2×78289634² = 12258533583707912, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 90287 + ... + 91149.

It is an arithmetic number, because the mean of its divisors is an integer number (7468848).

Almost surely, 2^78289634 is an apocalyptic number.

78289634 is a deficient number, since it is larger than the sum of its proper divisors (41211934).

78289634 is a wasteful number, since it uses less digits than its factorization.

78289634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609.

The product of its digits is 580608, while the sum is 47.

The square root of 78289634 is about 8848.1429690077. The cubic root of 78289634 is about 427.7940641738.

The spelling of 78289634 in words is "seventy-eight million, two hundred eighty-nine thousand, six hundred thirty-four".