1678428660 has 96 divisors (see below), whose sum is σ = 4865559552. Its totient is φ = 431861760.

The previous prime is 1678428659. The next prime is 1678428667. The reversal of 1678428660 is 668248761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678428667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 737284 + ... + 739556.

It is an arithmetic number, because the mean of its divisors is an integer number (50682912).

Almost surely, 2^1678428660 is an apocalyptic number.

1678428660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1678428660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2432779776).

1678428660 is an abundant number, since it is smaller than the sum of its proper divisors (3187130892).

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

1678428660 is a wasteful number, since it uses less digits than its factorization.

1678428660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713 (or 2711 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The square root of 1678428660 is about 40968.6301943328. The cubic root of 1678428660 is about 1188.4136431011.

The spelling of 1678428660 in words is "one billion, six hundred seventy-eight million, four hundred twenty-eight thousand, six hundred sixty".