78489016 has 16 divisors (see below), whose sum is σ = 149184000. Its totient is φ = 38706624.

The previous prime is 78489007. The next prime is 78489023. The reversal of 78489016 is 61098487.

It is a congruent 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, 66616 + ... + 67783.

It is an arithmetic number, because the mean of its divisors is an integer number (9324000).

Almost surely, 2^78489016 is an apocalyptic number.

It is an amenable number.

78489016 is a deficient number, since it is larger than the sum of its proper divisors (70694984).

78489016 is a wasteful number, since it uses less digits than its factorization.

78489016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134478 (or 134474 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 78489016 is about 8859.4026886693. The cubic root of 78489016 is about 428.1569139617.

The spelling of 78489016 in words is "seventy-eight million, four hundred eighty-nine thousand, sixteen".