678241746 has 288 divisors, whose sum is σ = 2023676928. Its totient is φ = 159563520.

The previous prime is 678241703. The next prime is 678241799. The reversal of 678241746 is 647142876.

Its product of digits (451584) is a multiple of the sum of its prime divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 18330840 + ... + 18330876.

It is an arithmetic number, because the mean of its divisors is an integer number (7026656).

Almost surely, 2^678241746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678241746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1011838464).

678241746 is an abundant number, since it is smaller than the sum of its proper divisors (1345435182).

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

678241746 is a wasteful number, since it uses less digits than its factorization.

678241746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 112 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 678241746 is about 26043.0748184618. The cubic root of 678241746 is about 878.6073642365.

The spelling of 678241746 in words is "six hundred seventy-eight million, two hundred forty-one thousand, seven hundred forty-six".