28609830 has 24 divisors (see below), whose sum is σ = 74385792. Its totient is φ = 7629264.

The previous prime is 28609829. The next prime is 28609873. The reversal of 28609830 is 3890682.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158854 + ... + 159033.

It is an arithmetic number, because the mean of its divisors is an integer number (3099408).

Almost surely, 2^28609830 is an apocalyptic number.

28609830 is an abundant number, since it is smaller than the sum of its proper divisors (45775962).

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

28609830 is a wasteful number, since it uses less digits than its factorization.

28609830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317900 (or 317897 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 28609830 is about 5348.8157567821. The cubic root of 28609830 is about 305.8476109094.

The spelling of 28609830 in words is "twenty-eight million, six hundred nine thousand, eight hundred thirty".