1909428724 has 12 divisors (see below), whose sum is σ = 3818857504. Its totient is φ = 818326584.

The previous prime is 1909428713. The next prime is 1909428727. The reversal of 1909428724 is 4278249091.

1909428724 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1909428727) 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, 34096914 + ... + 34096969.

Almost surely, 2^1909428724 is an apocalyptic number.

1909428724 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1909428724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1909428724 is a wasteful number, since it uses less digits than its factorization.

1909428724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68193894 (or 68193892 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 1909428724 is about 43697.0104698250. The cubic root of 1909428724 is about 1240.6077327944.

The spelling of 1909428724 in words is "one billion, nine hundred nine million, four hundred twenty-eight thousand, seven hundred twenty-four".