1928157816 has 64 divisors (see below), whose sum is σ = 5496573600. Its totient is φ = 558379008.

The previous prime is 1928157793. The next prime is 1928157817. The reversal of 1928157816 is 6187518291.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928157817) 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, 176461 + ... + 187068.

Almost surely, 2^1928157816 is an apocalyptic number.

It is an amenable number.

1928157816 is an abundant number, since it is smaller than the sum of its proper divisors (3568415784).

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

1928157816 is a wasteful number, since it uses less digits than its factorization.

1928157816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363568 (or 363564 counting only the distinct ones).

The product of its digits is 241920, while the sum is 48.

The square root of 1928157816 is about 43910.7938438831. The cubic root of 1928157816 is about 1244.6508089908.

The spelling of 1928157816 in words is "one billion, nine hundred twenty-eight million, one hundred fifty-seven thousand, eight hundred sixteen".