83809428 has 24 divisors (see below), whose sum is σ = 195724032. Its totient is φ = 27912384.

The previous prime is 83809423. The next prime is 83809469. The reversal of 83809428 is 82490838.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 83809428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83809423) 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, 16576 + ... + 21032.

It is an arithmetic number, because the mean of its divisors is an integer number (8155168).

Almost surely, 2^83809428 is an apocalyptic number.

It is an amenable number.

83809428 is an abundant number, since it is smaller than the sum of its proper divisors (111914604).

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

83809428 is a wasteful number, since it uses less digits than its factorization.

83809428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6031 (or 6029 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 83809428 is about 9154.7489315655. The cubic root of 83809428 is about 437.6204672884.

The spelling of 83809428 in words is "eighty-three million, eight hundred nine thousand, four hundred twenty-eight".