1675663728 has 20 divisors (see below), whose sum is σ = 4328798088. Its totient is φ = 558554560.

The previous prime is 1675663721. The next prime is 1675663747. The reversal of 1675663728 is 8273665761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1675663721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17454783 + ... + 17454878.

Almost surely, 2^1675663728 is an apocalyptic number.

It is an amenable number.

1675663728 is an abundant number, since it is smaller than the sum of its proper divisors (2653134360).

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

1675663728 is a wasteful number, since it uses less digits than its factorization.

1675663728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34909672 (or 34909666 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 51.

The square root of 1675663728 is about 40934.8717843357. The cubic root of 1675663728 is about 1187.7607131797.

The spelling of 1675663728 in words is "one billion, six hundred seventy-five million, six hundred sixty-three thousand, seven hundred twenty-eight".