1866949728 has 96 divisors (see below), whose sum is σ = 5895671040. Its totient is φ = 505336320.

The previous prime is 1866949723. The next prime is 1866949729. The reversal of 1866949728 is 8279496681.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1866949723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60343 + ... + 85878.

It is an arithmetic number, because the mean of its divisors is an integer number (61413240).

Almost surely, 2^1866949728 is an apocalyptic number.

It is an amenable number.

1866949728 is an abundant number, since it is smaller than the sum of its proper divisors (4028721312).

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

1866949728 is a wasteful number, since it uses less digits than its factorization.

1866949728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146260 (or 146252 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 60.

The square root of 1866949728 is about 43208.2136636080. The cubic root of 1866949728 is about 1231.3387340758.

The spelling of 1866949728 in words is "one billion, eight hundred sixty-six million, nine hundred forty-nine thousand, seven hundred twenty-eight".