678235284 has 36 divisors (see below), whose sum is σ = 1756247220. Its totient is φ = 220563840.

The previous prime is 678235279. The next prime is 678235297. The reversal of 678235284 is 482532876.

It can be written as a sum of positive squares in 2 ways, for example, as 310746384 + 367488900 = 17628^2 + 19170^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

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, 228279 + ... + 231230.

It is an arithmetic number, because the mean of its divisors is an integer number (48784645).

Almost surely, 2^678235284 is an apocalyptic number.

It is an amenable number.

678235284 is an abundant number, since it is smaller than the sum of its proper divisors (1078011936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678235284 is a wasteful number, since it uses less digits than its factorization.

678235284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459560 (or 459555 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 678235284 is about 26042.9507544748. The cubic root of 678235284 is about 878.6045738947.

The spelling of 678235284 in words is "six hundred seventy-eight million, two hundred thirty-five thousand, two hundred eighty-four".