1928166149 has 8 divisors (see below), whose sum is σ = 2373127680. Its totient is φ = 1525581936.

The previous prime is 1928166143. The next prime is 1928166167. The reversal of 1928166149 is 9416618291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1928166149 - 2⁸ = 1928165893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928166143) 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, 10594229 + ... + 10594410.

It is an arithmetic number, because the mean of its divisors is an integer number (296640960).

Almost surely, 2^1928166149 is an apocalyptic number.

It is an amenable number.

1928166149 is a deficient number, since it is larger than the sum of its proper divisors (444961531).

1928166149 is a wasteful number, since it uses less digits than its factorization.

1928166149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21188659.

The product of its digits is 186624, while the sum is 47.

The square root of 1928166149 is about 43910.8887293345. Note that the first 3 decimals coincide. The cubic root of 1928166149 is about 1244.6526020079.

The spelling of 1928166149 in words is "one billion, nine hundred twenty-eight million, one hundred sixty-six thousand, one hundred forty-nine".