678739416 has 64 divisors (see below), whose sum is σ = 1799884800. Its totient is φ = 212556288.

The previous prime is 678739393. The next prime is 678739421. The reversal of 678739416 is 614937876.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302025 + ... + 304263.

It is an arithmetic number, because the mean of its divisors is an integer number (28123200).

Almost surely, 2^678739416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678739416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (899942400).

678739416 is an abundant number, since it is smaller than the sum of its proper divisors (1121145384).

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

678739416 is a wasteful number, since it uses less digits than its factorization.

678739416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008 (or 3004 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 51.

The square root of 678739416 is about 26052.6278137158. The cubic root of 678739416 is about 878.8222087838.

The spelling of 678739416 in words is "six hundred seventy-eight million, seven hundred thirty-nine thousand, four hundred sixteen".