678909235 has 12 divisors (see below), whose sum is σ = 859828608. Its totient is φ = 514540368.

The previous prime is 678909223. The next prime is 678909251. The reversal of 678909235 is 532909876.

It is not a de Polignac number, because 678909235 - 2¹⁹ = 678384947 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186259 + ... + 189868.

It is an arithmetic number, because the mean of its divisors is an integer number (71652384).

Almost surely, 2^678909235 is an apocalyptic number.

678909235 is a deficient number, since it is larger than the sum of its proper divisors (180919373).

678909235 is a wasteful number, since it uses less digits than its factorization.

678909235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376170 (or 376151 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 49.

The square root of 678909235 is about 26055.8867628795. The cubic root of 678909235 is about 878.8954957529.

The spelling of 678909235 in words is "six hundred seventy-eight million, nine hundred nine thousand, two hundred thirty-five".