1678212928 has 56 divisors (see below), whose sum is σ = 3819777984. Its totient is φ = 716620800.

The previous prime is 1678212911. The next prime is 1678212929. The reversal of 1678212928 is 8292128761.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678212929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119223 + ... + 132553.

Almost surely, 2^1678212928 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 1678212928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909888992).

1678212928 is an abundant number, since it is smaller than the sum of its proper divisors (2141565056).

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

1678212928 is a wasteful number, since it uses less digits than its factorization.

1678212928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13631 (or 13621 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 1678212928 is about 40965.9972172044. The cubic root of 1678212928 is about 1188.3627244764.

The spelling of 1678212928 in words is "one billion, six hundred seventy-eight million, two hundred twelve thousand, nine hundred twenty-eight".