28327830 has 16 divisors (see below), whose sum is σ = 67986864. Its totient is φ = 7554080.

The previous prime is 28327823. The next prime is 28327837. The reversal of 28327830 is 3872382.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28327823) and next prime (28327837).

It is a junction number, because it is equal to n+sod(n) for n = 28327791 and 28327800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28327837) 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, 472101 + ... + 472160.

It is an arithmetic number, because the mean of its divisors is an integer number (4249179).

Almost surely, 2^28327830 is an apocalyptic number.

28327830 is an abundant number, since it is smaller than the sum of its proper divisors (39659034).

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

28327830 is a wasteful number, since it uses less digits than its factorization.

28327830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944271.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28327830 is about 5322.3895009666. The cubic root of 28327830 is about 304.8394030459.

The spelling of 28327830 in words is "twenty-eight million, three hundred twenty-seven thousand, eight hundred thirty".