784138132 has 48 divisors (see below), whose sum is σ = 1468938240. Its totient is φ = 365202432.

The previous prime is 784138111. The next prime is 784138139. The reversal of 784138132 is 231831487.

It is a super-2 number, since 2×784138132² = 1229745220112898848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 784138091 and 784138100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (784138139) 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, 1322028 + ... + 1322620.

It is an arithmetic number, because the mean of its divisors is an integer number (30602880).

Almost surely, 2^784138132 is an apocalyptic number.

It is an amenable number.

784138132 is a deficient number, since it is larger than the sum of its proper divisors (684800108).

784138132 is a wasteful number, since it uses less digits than its factorization.

784138132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880 (or 878 counting only the distinct ones).

The product of its digits is 32256, while the sum is 37.

The square root of 784138132 is about 28002.4665342180. The cubic root of 784138132 is about 922.1414090399.

The spelling of 784138132 in words is "seven hundred eighty-four million, one hundred thirty-eight thousand, one hundred thirty-two".