1838791728 has 60 divisors (see below), whose sum is σ = 5416916440. Its totient is φ = 580670208.

The previous prime is 1838791697. The next prime is 1838791729. The reversal of 1838791728 is 8271978381.

It is a happy number.

1838791728 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1838791728² = 6762310037922451968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1838791729) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333301 + ... + 338772.

Almost surely, 2^1838791728 is an apocalyptic number.

1838791728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1838791728 is an abundant number, since it is smaller than the sum of its proper divisors (3578124712).

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

1838791728 is a wasteful number, since it uses less digits than its factorization.

1838791728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672106 (or 672097 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 1838791728 is about 42881.1348730418. The cubic root of 1838791728 is about 1225.1168519380.

The spelling of 1838791728 in words is "one billion, eight hundred thirty-eight million, seven hundred ninety-one thousand, seven hundred twenty-eight".